HP + T4 + B-Spec + SM at Buttonwillow Raceway Park

competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In
addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
In B-Spec Spec Lines, Nissan Versa S (2020-), change as follows:
Min weight: "2700 2550"
Add to Notes: "This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate
Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM
or similar device must be submitted."
In B-Spec Spec Lines, Toyota/Scion IA Sedan (16-20), change as follows:
Min weight: 2700 2450"
Add to Notes: "This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate
Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM
or similar device must be submitted."

Wheel/rim weight shall be 17 lbs. All wheels shall be one-piece metal castings or metal two piece welded. All four wheels must
be the same dimensional offset. Aftermarket wheel studs and/or wheel bolts are allowed. Wheel bolts may be replaced with
studs and nuts. Wheel spacers are allowed, the same thickness spacer must be used on all four corners. "

"Honda Fit Automatic AT (07-08)"
"Honda Fit MT (09-14)"
"Hyundai Accent GS Hatchback (12-19)"
"Kia Rio 5-door/LX Hatchback (12-19)"
"Nissan Versa S (2020-)"
"Toyota Yaris Hatchback (07-11)"
"Toyota Yaris Hatchback (12-18)"

Wheel/rim weight shall be 13 lbs.
C-Spec Required wheel/rim diameter is seventeen inches (17”). Maximum wheel/rim width is eight inches (8”). Minimum
Wheel/rim weight shall be 17 lbs.
Wheels are permitted any offset provided the tire tread (that portion of the tire that contacts the ground) does not protrude
beyond the fender opening when viewed from the top perpendicular to the ground."

B14 kit #47-171725 verified compatible."

Mini Cooper (R56) AT (07-10): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar
links part number 35 50 6 772 is allowed."
Mini Cooper Clubman (R55) (07 - 10): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway
bar links part number 35 50 6 772 is allowed."
Mini Cooper (R56LCI) MT (11-13): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar
links part number 35 50 6 772 is allowed."
Mini Cooper (R56LCI) AT (11-13): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar
links part number 35 50 6 772 is allowed."
Mini Cooper Countryman (R60) (11-16): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable
sway bar links part number 35 50 6 772 is allowed."
Mini Cooper Paceman (R61) (11-16): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway
bar links part number 35 50 6 772 is allowed."
Mini Cooper Clubman (R55) (11-15): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway
bar links part number 35 50 6 772 is allowed."
Mini Cooper Coupe (R58) (12-15): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar
links part number 35 50 6 772 is allowed."

In T2 Spec Lines, Ford Mustang GT 5.0L (15-17), change Notes as follows:
"Alternate metallic driveshaft is allowed."
In T2 Spec Lines, Ford Mustang GT 5.0L (2018-), change Notes as follows:
"Alternate metallic driveshaft is allowed."
In T2 Spec Lines, Ford Mustang Coupe GT & Shelby GT 4.6L (05-10), change Notes as follows:
'An Aluminum driveshaft is allowed."
"Alternate metallic driveshaft is allowed."
In T3 Spec Lines, Ford Mustang Coupe GT & Shelby GT 4.6L & Cal. Special (05-10), change Notes as follows:
"An Aluminum driveshaft is allowed."
"Alternate metallic driveshaft is allowed."
In T3 Spec Lines, Ford Mustang V6 (11-14), change Notes as follows:
"Driveshaft from Alternate metallic driveshaft is allowed."

"31mm flat plate restrictor required. Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81,
Damper RR 52610F23SA80, Spring adjust assy RR 52691F23SA80, Bushing Comp, Damper RR TBD, Camber
Adjuster Comp, Damper 51920F23SA82, Damper wrench kit 89211F23SA80, Hose Set, FR & RR Brake
01464F23SA810, Pad Set, XR2 D948 54022F27SA81, Disk, FR Brake 45250F23SA80, Air cleaner element assy
17220FC4YA80, Exhaust pipe assy 18300F23SA81, ACG belt (6PK858) 31110FC4YA80. Allow rear sway bar
Progress 62.1063. CVT cars only Allow Setrab 50-119-7612 transmission cooler in addition to OEM."

wheels by the use of slotted adjusters at the top of the strut mounting plates. They shall be located on the existing
chassis structure, utilizing the manufacturers original bolt holes and may not serve as reinforcement for that
structure. Any spring up to a maximum spring rate of 500 lbs. front and 800 lbs. rear may be used. Wheels conforming
to B-spec rules are permitted."
In T4 Spec Lines, Mini Cooper S (2016-), change Model and add to Notes as follows:
"Mini Cooper S (20142016-2023)"
Notes: "Convertible model not allowed. Any spring up to a maximum spring rate of 500lbs. front and 800lbs. rear may
be used."

b. When using the Hankook wet tire, all cars get a 0.2” lower ride height allowance due to smaller radius of the wet tire."

Honda Fit AT (09-14)
Weight: "2525 2500"
Notes: "Any Cold Air Intake Package allowed (any manufacturer) with a 25lb adder."
Honda Fit CVT (15-19)
Notes: "31 3mm"
Mini Cooper Hatchback (R50) CVT (02-06)
Weight (lbs): "2545 2500"
Mini Cooper (R56) AT (07-10)
Notes: "44 6mm (OE Catalyst) or 40 2mm (Header)"
Mini Cooper (R56LCI) AT (11-13)
Notes: "43 5mm (OE Catalyst) or 41mm (Header)"

In C-Spec Spec Lines, change Chevrolet Cruze (2010-16), add to Notes the following:
"Allow Babyface Fabrication brake caliper piston CRZ-SS."

Racing
B. CLASSIFIED CARS
AND WEIGHTS
2006-2015 production-based MX-5
Cars are to be weighed with the driver and required ballast.
C. AUTHORIZED
MODIFICATIONS
Only the left-hand drive, North American-version of the 2006-2015 Mazda MX-5 convertible & power retractable hardtop
(PRHT) are eligible. The original OE vehicle identification number (VIN) stamped on the firewall must correspond with the
model year automobile as classified. VIN plates or stampings must remain in place, with the firewall VIN taking precedence.
A Mazda Factory Shop Manual for the specific make, model, and year of automobile is required to be in the possession
of each entrant. The manual may be in the form of printed material, microfiche, CDs, DVDs, and/ or Internet access to
manufacturer sponsored web-based databases that is readily accessible at time of inspection. The manual is intended to
aid scrutineers in identifying parts and the configuration of the automobile.
The items outlined in this VTS document represent the only modifications and safety items permitted and/or required on
Spec MX-5 vehicles other than safety items as required in SCCA’s current GCR Section
9. Parts and components may not perform an unauthorized function (i.e. Modifications must be stated as authorized or
cannot be done).
If the Mazda Factory Manual or these rules provide only a partial specification or no specification at all, the Mazda parts may
not be modified beyond what is permitted in these rules. Compliance will be determined by comparison to new or like parts
and/or the parts compliance measurement listing delivered by Mazda. Other approved parts with only a partial specification
or no specification available in these rules may not be modified.
Assembly, rebuild, and refurbishment procedures, and all associated dimensions must adhere to the published factory
service procedures, except as otherwise stated in these rules. No components may be added or omitted from those
specified by the published factory service procedures. All components must be comply with stated standard dimensions.
It is permitted to use industry standard procedures to repair damaged components.
The use of any painting, coating, plating, metal treatment process or impregnating substance (e.g., anti- friction, thermal
barrier, oil shedding coatings, chrome, anodizing, REM, isotropic finishing, etc.) to any internal engine surface, internal
axle components, internal transmission or differential surface, internal or external surfaces of the intake manifold, exhaust
manifold or down tube, is prohibited.
D. VEHICLE
TECHNICAL
SPECIFICATIONS
(VTS)
1. Vehicle Weight
a. The minimum vehicle weight with driver is 2,525.0 lb.
2. Ballast
If ballast is required to meet the required minimum weight, it must be added as follows:
a. A ballast base plate must be securely mounted using the factory OE passenger seat mounting bolt holes and bolts. Any number
of additional segments of ballast may be attached to the base plate.
b. Each segment of ballast must be fastened to the base plate with a minimum of two (2) one-half (1/2) inch bolts/studs and
positive lock nuts of SAE Grade 5/ Metric 8.8 or better and must utilize large diameter, load distributing washers. In lieu of
positive lock nuts it is permitted to positively thread the additional segments of weight into the base plate.
c. Holes are not permitted to be drilled in the floor pan to mount ballast.
3. Chassis
a. Towing eyes per SCCA’s current GCR Section 9.3 are required. There must be an arrow that strongly contrasts with the vehicle
paint scheme pointing to each tow eyestrap.
9.1.7.1 SPEC MX-5 (SMX)
b. All cars must use the front subframe PT# - NE51-34-800C
c. All cars must use the rear subframe PT# - NE51-28-800B.
d. OE strut tower brace is required; it is comprised of three (3) components; see Table 1 for part numbers.
e. An engine to fender brace located on the passenger side of the engine bay may be used if mounted in such a way that it does not foul brake
lines, fuel lines, or other systems that would interfere with the safe operation of the vehicle under race conditions – see Table 1 for allowed
modifications. (Mazda Motorsports PT# 0000-07-5600)
f. Disabling or removing of the door locking mechanism must be performed.
g. To facilitate frequent lifting of the vehicle, a 3/4” boxed tube not to exceed 12” long may be added under the rocker panel inboard of
the factory pinch weld flange on each side of the vehicle.
h. Convertible tops/power retractable hard tops (PRHT) and attaching hardware must be completely removed.
i. All chassis, structural, and electrical repairs, if performed, must be in conformity with factory procedures, specifications, and dimensions.
Unless specifically authorized by the manufacturer for repair or permitted by these rules, no reinforcement (e.g., seam welding, material
addition, etc.) is permitted.
j. Removal of excess wiring is permitted provided it serves no other purpose and does not splice or interrupt the OE harnesses. Removal of the
following systems is permitted: audio equip- ment; power seats; airbag/supplemental restraint systems components; heated seats; interior
lighting; power windows; and power door locks. (No additional wiring may be added except as permitted in other sections - e.g., Section 16:
Electrical Equipment.)
Table 1: Strut Tower Brace Parts
Description Mazda Part #
Right Side of Strut Tower
Brace
NE57-56-48X
Left Side of Strut Tower
Brace
NE57-56-49X
Center Section of Strut
Tower Brace
NE57-56-48ZA
k. A hole is permitted to be drilled in part #’s NE57-56-48X and NE57-56-49X to allow for access to the shock adjuster screw is permitted (it is
recommended that the hole not be larger than 15mm); NE57-56-48X may be modified in order to allow room for the engine passenger side
engine brace; no other modifications or other braces are permitted.
l. MX-5 donor chassis with originally equipped with 16” OE wheels require installation of
OE strut tower brace (part # NE57-56-35XA).
m. To facilitate engine bay air flow for cooling purposes it is permitted to remove the section outlined below in red from OE PT# NE57-56-
35XA. Block-off plates must be installed at the fresh air vent for the HVAC module at the firewall under the cowl to isolate driver
compart- ment from engine compartment.
(FIREWALL BLOCKOFF PLATE 0000-07-5832) No additional modifications are permitted.
4. Body
a. Interior and exterior door handles are required to remain operable. Alternate interior door handles or cord/strap are permitted.
b. The driver’s and passenger’s side inner door structural panel may be removed to fit the cage.
c. The stock side impact/anti-intrusion beam must not be modified or removed.
d. Door locking mechanisms must be disabled or removed.
e. A minimum of two (2) of the brake lights must be in working order per the current GCR Section 9.1.
f. The two (2) OE unmodified, external mirrors for the correct the Mazda MX-5 (left and right) are required; they must be
mounted in stock location and may not be modified.
g. OE interior rearview mirror or an aftermarket rearview mirror must be used.
h. 2006-2015 MX-5 bodywork may be updated or backdated, OE body parts only. (This includes Mazda OE accessory body
parts such as trunk lid spoiler, side skirts, front air dam.)
i. Mazda Motorsports’ fiberglass headlamp replacements may be used; (See table 2)
no modifications or substitutions are permitted; exceptions: painting, covering, and wrapping.
Table 2: Headlamp Replacement Covers
Model Year Mazda Part # Description
2006-2008 0000-07-5818-LT Left Side
2006-2008 0000-07-5818-RT Right Side
2009-2015 0000-07-5819-LT Left Side
2009-2015 0000-07-5819-RT Right Side
j. Lexan windshield may be used in place of the stock windshield. (Mazda Motorsports PT# -
0000-07-5101-5S)
k. Windshield clips per current GCR Section 9.3 windshield clips are recommended.
l. Hood and trunk pins or clips are permitted. Factory hood and trunk latches must remain intact and operational and may not be
removed, disabled or altered.
m. Front under hood weather strip must remain intact PT#- NE51-56-750
n. Rear under hood weather strip must remain intact PT#- NE51-56-760
o. Modification of release cables is permitted to facilitate external pull/opening straps/pulls/cords.
p. A radiator screen of 0.125” minimum stainless-steel mesh may be added in front of the radiator.
1. The screen must be a single layer and must be installed to the bumper cover and or grill and be contained entirely within the
bodywork of the vehicle.
2. Tape may be applied to the mesh screen.
3. The OE grill must remain intact.
q. It is allowed to apply roll bar padding to the crash support bar (52-070) located behind the front bumper to prevent damage to the
bumper.
r. Front and rear fender lips may be rolled to prevent tire damage.
s. Front OE fender liners must be intact and unmodified, except for what is allowed in section 13. J regarding brake ducts.
Repairs due to on-track damage is allowed so long as it serves no other purpose.
t. OE fog lights lens/glass must be removed. This will allow for the installation of brake duct kit (Mazda Motorsports’ part # 0000-03-
5301-NC.) The remaining opening from the fog light lens must either be blocked, or a connection must be made from the fog lamp
opening/hole in the bumper fascia to a brake duct attached to the hub.
u. Side marker lenses may be removed, and holes may be covered.
v. OE hard top or the unmodified Mazda Motorsports hard top (part # 0000-07-5901-CC)
are permitted.
w. PRHT chassis cars must trim the finish panel with the 3rd brake light to fit one of the approved hard tops.
1. Hhardtops may be painted or wrapped.
2. OE hard top latches must be removed and replaced with positive fasteners.
3. The front of the hard top may attach to the upper windshield bar of the roll cage.
4. It is permitted to run one single piece of racer tape to cover the leading edge of the after- market hard top where it meets
the factory windshield frame.
5. Openings beneath the hard top seal to the body are not permitted. The hard top must be securely mounted to the body of the vehicle
and perform no other purpose.
6. Body repair must be performed to maintain stock body contours, lips, profiles, etc. body repair modification must not increase clearance.
x. To improve driver’s exit through the window area, the driver and passenger vent window and vent window supporting frame may be removed
as an assembly.
1. Vent windows may be modified to accept fresh air ducting.
y. OE radio antennas may be removed. Antennas for two-way radios may be added.
z. Insulation & undercoating may be removed.
aa. All cars must run with both the front door windows fully open (i.e. fully down).
5. Cockpit /
Trunk
a. All interior trim components such as carpets, seats, cargo bins, seat belts, floor mat, firewall insu- lation/blanket, sound deadener patches,
undercoating, radio systems, speakers, dome lights, grab handles, sun visors and their insulating and attaching materials, must be removed.
Other than to provide for the installation of required safety equipment or other authorized modifications, no other driver/passenger
compartment alterations or gutting are permitted.
b. It is permitted to install a radio replacement panel.
c. The outer edges of the dashboard may be cut the minimum amount required to install the roll cage.
d. Air bag systems must be disarmed and must be removed.
e. It is permitted to remove all components of the cruise control system.
f. The top portion of the door panels containing the door latch release handle must remain intact.
g. The lower portion of the door panels must be removed for installation of the roll cage. Gutting of the door may not go outside of the factory
seal.
h. The door window glass and window operating mechanisms must be removed.
i. The OE dashboard and its attaching hardware and brackets must be retained.
j. For installation of required safety equipment, however, it is permitted to modify the OE dash bar, so long as it is outboard of the first dash support
brackets (illustration below). Modification of the first dash support brackets, nor inboard from them, is not permitted. The OE dash bar must be
securely mounted.
k. The HVAC control module located under the dash may be removed together with the following: blower motor, evaporator core,
heater core and associated ducting. Once removed it is permitted to block the blower inlet passage on the firewall.
l. All openings between the driver/passenger compartment and the trunk / gas tank area that include the filler tube & fuel tank vent
must be filled completely with a metal bulkhead that is securely mounted (E.G. nuts/bolts, nut-serts, rivets). This shall close the
entire trunk from the driver/ passenger compartment and comply with current GCR Section 9.3.
m. Mazda Motorsports’ finish panel trim kit (part # 0000-07-5822) may be used to create the required bulkhead above
n. It is permitted to remove the driver’s side factory seat mounts, but not the floor pan.
o. It is permitted to remove the horn and all associated horn related components.
p. OE driver’s seat must be replaced with a one-piece bucket-type race seat per current GCR Section 9.3.
q. The passenger seat must be removed.
r. Any steering wheel except wood rimmed types may be used.
s. Any shift knob may be used.
t. The air conditioning equipment located in the engine compartment (AC compressor assembly, associated lines/dryer and the
condenser) must be removed.
u. Alternate gauges and instruments may be added. The original instrument cluster must remain connected and functional However,
it may be relocated to allow the mounting of an aftermarket dash such as an AiM. The wiring to relocate the dash may not be cut or
extended, it may only be re-routed. The remainder of the dashboard or panel must remain intact.
v. Modifications may be made to the foot pedals to improve the comfort and accessibility to the driver; relocation of mounting
points is not permitted.
1. Dead pedal/footrest and heel stop may be added.
w. Instrument clusters must be unmodified OE parts .
x. Two-way radios may be used.
y. Alternate means of windshield defrosting is permitted
6. Engine
Modifications
6.1. General
a. No modifications to the engine are permitted, except where specifically authorized within these rules. This includes but is not
limited to: all fuel injection and engine management components, as well as electrical, cooling, and lubrication systems.
b. All systems, unless otherwise stated, are subject to test procedures and must conform to OE
specifications as stated in the Mazda Factory Service Manual.
c. Permitted engine maintenance includes the replacement, but not modification, of external engine and engine systems parts.
1. No balancing, blue printing, lightening, polishing or other modification of moving parts of the engine is permitted.
2. All parts in the engine must be OE parts unless specified in this rule set.
3. For all Mazda part numbers in these specifications, superseding part numbers are consid- ered equivalent.
d. Compression ratio for 2.0L engines must be 11.00:1; calculated using the official Spec MX-5 calculator.
6.2. Engine Block
a. The engine block may be decked or milled to achieve the class specified compression ratio. Honing of cylinders is permitted to accommodate
piston clearance so long as a maximum standard diameter is not exceeded shown in Table 3.
b. The cylinders may be bored to accommodate piston clearance requirements so long as maximum permitted overbore diameter is not exceeded
shown in Table 3 below.
Table 3: Piston Sizes
Piston Part # Bore Diameter Max
Standard 0000-01-5310 87.6046mm (3.449”)
Allowed Overbore (.020) 0000-01-5310-OS 88.1126mm (3.469”)
c. It is not permitted to overbore a single cylinder; all cylinders must be bored equally.
d. Sleeving of cylinders is not permitted.
6.3. Crankshaft
a. OE Mazda MZR 2.0L (2009-2015) manual transmission crankshaft (part # LF9G-11-301) must be used with no modifications except for
machining or polishing polishing and/or machining of the bearing surfaces to allow the use of main and rod bearings as permitted
in Table 4 below.
Table 4: Crankshaft Measurements
easurement iameter Diameter
b. OE crankshaft (Mazda part # LF9G-11-301) must weigh a minimum of 31.75lb.
c. Maximum permitted stroke is as follows: 3.27” / 83.1mm
d. Shot peening is prohibited.
e. Bearings
1. Main and rod bearings must not be modified; coatings are not permitted.
2. OE bearings are permitted.
3. The only bearing sizes permitted other than OE are listed in see Table 5.
Sizes
Bearing Type Minimum Bearing
Width Minimum Bearing
Thickness Minimum Bearing
Weight Part #
Main Bearings
(Standard H) .630” 0.097” N/A 0000-01-5215-MB
Main Bearing
(Standard HX) .630” 0.097” N/A 0000-01-5216-MB
Rod Bearings
(Standard H) .630” 0.057” 28g 0000-01-5213-RB
Rod Bearing
(Standard HX) .630” 0.057” 28g 0000-01-5214-RB
f. The crank trigger must not be modified; it must be installed per the Mazda Factory Service Manual.
g. OE crank pulley/balancer (Mazda part # LF94-11-400) must not be modified and must be installed per the Mazda Factory Service Manual.
h. Knife edging of the crankshaft is not permitted.
i. Modifications to the crankshaft counterweights are not permitted.
j. Coatings, REM or metal treatments of any kind are not permitted.
k. Alternate shifter bushing located at the bottom of the shift lever is allowed.
6.4. Connecting Rods
a. OE Mazda MX-5 (2009-2015) manual transmission unmodified connecting rods (part # LF9G- 11-210) must be used. Connecting
rod weight with cap and bolts must not be less than 530 grams.
6.5. Pistons
a. Mazda Motorsports’ competition pistons (standard bore part # 0000-01-5310; oversized part # 0000-01-5310 OS) are required;
no modification is permitted.
b. The minimum weight of the piston, less wrist pin and hardware, must not be lighter than 290 grams.
c. Mazda Motorsports’ competition wrist pin (part # 0000-01-5310-PN) must be used.
d. The minimum weight of the wrist pin must not be lighter than 80 grams.
e. Modification of the piston ring end gap width is permitted.
6.6. Cylinder Head
a. Mazda Motorsports’ competition cylinder head (part # 0000-01-5300) must be used; no modi- fications to the cylinder head are
permitted outside of the gasket face surface outlined below in Table 6.
b. Intake runner CC volume is 182cc +/- 1cc.
c. Exhaust runner CC volume is 114cc +/- 1cc.
d. Combustion chamber volume may not be below 41cc.
e. The gasket face of the cylinder head may be resurfaced provided the maximum allowed compression ratio is not
exceeded.
I. Surfacing of the head gasket surfaced must be in a flat plane.
II. Cylinder head gasket surface distortion may not exceed .010mm or 0.004”.
f. The minimum height of the cylinder head as measured must be at least (TBA)
g. The following head gaskets in Table 6 below are permitted; no other gaskets may be used.
Table 6: Head Gasket Measurements
Description Thickness Mazda Part #
OE Gasket 0.017” approximate crush
depth L3G2-10-271A
Competition
Gasket 0.55mm (0.021”) 0000-01-5319-21
Competition
Gasket 0.75mm (0.030”) 0000-01-5319-30
Competition
Gasket 1.0mm (0.040”) 0000-01-5319-40
Competition
Gasket 1.3mm (0.051”) 0000-01-5319-51
6.7. Camshaft and Camshaft Timing
a. Camshafts must not be modified; see Table 7 for OE camshaft part numbers.
Table 7: Camshaft part numbers
Description Mazda Part #
Intake Cam L3E3-12-420
Exhaust Cam L309-12-441B
b. Camshaft and crankshaft sprockets must not be modified; see Table 8 for part numbers.
shaft Sprocket Part #s
t #
4X0C
425
c. Cam timing must not be altered; chain must be installed as stated in the Mazda Factory Service Manual.
d. OE timing chain (Mazda part # LF7A-12-201) is required; no modification is permitted.
e. OE timing chain components must be used; see Table 9 for Mazda part numbers.
Table 9: Timing Chain Guide Part #s
Description Mazda Part #
Fixed Guide LF01-12-614
Tensioner Guide LF01-12-671
6.8. Valves
a. OE valves must not be modified (including reshaping); see Table 10 for Mazda part numbers.
le 10: Valve Part #s
b. Valve location or angle must not be moved.
c. Valve guides may not be replaced.
d. Valve job measurements must be as follows:
1. Intake 35 top 45 seat 65 bottom 77 bottom seating angle width is 1.0mm
2. Exhaust 40 top 45 seating to radius seating angle width 1.2 mm.
3. Valve stem installed height must be per the Mazda Factory Service Manual.
4. Valve stem seals must be OE.
6.9. Valve Springs
a. Mazda Motorsports’ competition valve springs (part # 0000-01-5319-SP) are required.
6.10. Intake Manifold
a. OE intake manifold (Mazda part # LF9G-13-130B) is required; no modification is permitted (e.g., no material may be added or removed; no
painting or coating on the exterior or interior permitted).
b. All air entering the engine must pass through the throttle body and metered by the mass airflow sensor.
c. Removal of these factory EGR components is permitted: Valve, crossover pipe, coolant lines (EGR DELETE KIT 0000-06-5447)
d. If factory EGR components are removed, the following ports must be blocked:
1. Intake manifold cross over pipe port.
2. Cylinder head cross over pipe port.
3. EGR valve port on back of cylinder head.
6.11. Intake System
a. Cars must replace OE air box with the Mazda competition cold air intake kit (part # 0000-06- 5150-KT); no modification (e.g., ducting or
baffling of air, venturi cones) to the cold air intake kit is permitted.
b. No alteration to the intake tube length, diameter, or shape is permitted.
c. The air filter supplied in the Mazda Motorsports competition cold air intake kit may be refreshed
with the Mazda Motorsports’ competition air filter (part # 0000-06-5204).
6.12. Fuel System
a. Fuel must comply with SCCA GCR section 9.3.25
b. OE fuel pump (Mazda part # LFG1-13-350) is required; no modification is permitted.
c. It is permitted to remove the unleaded fuel restrictor from the filler neck. (GCR 9.3.26)
d. Mazda Motorsports’ competition fuel rail that includes fuel pressure gauge, and fuel sampling test port and hose kit (part #
0000-06-5207) is optional.
1. Fuel pressure sensor integrated into the required AIM data acquisition system is required. It must be operational and able to be
viewed when pulling a competitor on track data.
2. The addition of a switch or jumper located in the under-hood fuse box is allowed to acti- vate the fuel pump. This modification may
serve no other purpose.
3. One operational fuel sample test port is required. Fuel sample test ports shall be made from dry break fuel rated quick disconnects.
No other style of fuel sample test port is allowed (e.g., Schrader valves).
4. No other modifications permitted.
e. OE fuel pressure regulator (Mazda part # LFB6-13-280) is required.
1. Vehicle must run between 54 and 63 PSI of fuel pressure.
f. OE injectors (Mazda part # L3G5-13-250) are required; no modification is permitted.
1. Flow rates for the injectors must fall within the factory tolerance of 204-216ml (204-216 cc, 12.5-13.1 cu in/minute).
6.13. Lubrication System
a. OE engine oil filter is required; no substitutions permitted.
b. OE oil pump PT# L310-14-100J is required and no modifications are permitted.
c. Mazda Motorsports’ competition oil cooler adaptor kit with lines (part # 0000-01-5100KT) is required; no modification is
permitted.
d. Oil pressure sensor integrated into the required AIM data acquisition system is required. It must be operational and able to be
viewed when pulling a competitor on track data.
e. Oil and lubricants are unrestricted.
6.14. Engine Control Unit (ECU)
a. Reference penalties for non-compliance of the Spec ECU flash in Section 21 below. Modifica- tion or attempted modification of
the Spec ECU flash will result in a 12-month suspension from competition and $1,000.00 fine.
b. Mazda Motorsports’ competition ECU (part # 0000-01-5379) is required; serial number must be visible; external or internal
modification is not permitted.
c. ECU calibrations and inputs must not be modified.
d. OE engine electrical harness (part # NH18-67-020A) is required; no modification is permitted.
e. OBDII diagnostics port must be operational in all cars.
1. The check engine light must be operational and perform the function test at start up.
2. The OBDII port must be available at all times (including during the race) for tech officials to install test equipment as necessary.
3. If a competitor uses the OBDII port to power any type of data acquisition system, he/she would be responsible for providing the
splitter cable to plug in both units or unplug the data acquisition system.
f. Instrument panel clusters must be operational and unmodified OE parts.
g. Temporary data acquisition devices may be installed by the sanctioning body for technical compliance.
h. Removal of Mazda ECU insulator PT# LFG1-13-3C1 is permitted (diagram below)
6.15. Miscellaneous
a. The factory air conditioning system and all associated lines, compressor, condenser and evap- orator must be removed.
1. Once the AC compressor is removed, the OE AC pulley delete kit (Mazda part # LF17-15- 940E) is required.
b. Serpentine belt Gates PT# 6PK-2170 or same size equivalent is required.
7. Exhaust
a. OE exhaust manifold and OE heat shield must be replaced with Mazda Motorsports’ competi- tion part # 0000-06-5407-NC; no modification
is permitted (e.g., internal or external wraps, coatings, paints, metal treatments, thermal barriers etc.).
b. OE exhaust system must be replaced with Mazda Motorsports’ competition part # 0000-06- 5427-NC; no modification is permitted (e.g.,
internal or external wraps, coatings, paints, metal surface treatment, thermal barriers etc.).
c. The forward oxygen (O2) sensor (OE Lambda Sensor) must remain in the factory location and in full working order. Mazda Motorsports’
competition O2 sensor installation kit wiring extender (part # 0000-10-5320) is permitted.
d. The secondary post catalytic oxygen (O2) sensor must be removed.
e. Heat shielding
1. OE heat shield protecting ABS unit from header may not be removed or modified.
2. OE muffler heat shield may not be removed or modified.
3. It is permitted to wrap the exhaust pipe from the mid connection flange to the muffler.
(see red arrows in picture below)
4. Use of heat shielding material on transmission tunnel to replace OE heat shielding is permitted. OE heat shielding
must be removed from transmission tunnel. (see diagram below)
8. Cooling System
(cooling system
checklist)
a. Mazda Motorsports’ competition radiator and oil cooler assembly (part # 0000-01-5504-CR) is required (e.g., OE is not
permitted).
b. The radiator using the OE mounting brackets must be installed in its original location.
c. The oil cooler may not be moved or altered from the pre-assembled mounting location.
d. Radiator ducting may be placed on each side of the radiator tanks and the undertray to force air through the radiator fins. The
gap between the top and sides of the radiator may be sealed but shall not perform any other function.
e. The unmodified OE cooling fan must be maintained in full working order and mounted in the stock location. Axillary control of
the radiator cooling fan may be added to activate the fan independent of the ECU, OE control of the fan must remain intact.
f. Thermostats may be modified, removed or replaced.
g. The OE water pump (Mazda part # 1F70-15-100) is required; no modification is permitted.
h. The OE water pump pulley (Mazda part # L327-15-131) is required; no modification is permitted.
i. Engine cooling system hoses and clamps may be substituted.
j. The heater core may be removed along with HVAC evaporator core including all associated hard pipes and hoses. This is to include
OE water to oil cooler lines as well as throttle body coolant lines. (Rear coolant pipe 0000-01-5514, bottom coolant pipe 0000-
01-5515)
k. The OE engine coolant expansion tank may be replaced with any aftermarket part but and must not serve another purpose.
9. Clutch, Pressure Plate and Flywheel
a. Vehicle may use any combination of the options listed in Table 11 below.
Table 11: Clutch Component Part Numbers
Description Mazda Part #
Mazda Factory Clutch Disc LF05-16-460A
ACT Sprung Clutch Disc 0000-02-5420-AC
ACT Pressure Plate 0000-02-5405-AC
ACT Clutch and PP Kit 0000-02-5004-G6
Mazda Factory
Pressure Plate LF04-16-410A
b. The unmodified pressure plate must be bolted directly to the stock, unmodified flywheel.
c. OE flywheel (Mazda part # LF9G-11-500) is required. Factory Service Manual resurfacing specification is permitted; no
other modification is permitted.
d. Alternate clutch lines are permitted but must not serve another purpose.
e. Clutch components must adhere to the minimum weights listed in Table 12 below:
Table 12: Clutch Component Part Numbers
Description Minimum Weight (lb.)
Clutch disc 3.5
Pressure Plate 9.4
Flywheel 15.80
10. Transmission
a. OE 2006-2015 6-speed gearbox and 4.10 final drive ratio are required.
b. No modification of the internal parts and ratios are permitted except the installation of the unmodified parts contained in the Mazda
Motorsports MX-5 transmission upgrade kit (part # 0000-02-5700).
c. Mazda Motorsports Competition gear set 0000-02-6000 is allowed. Gear ratios are as follows: 1st - 3.82; 2nd - 2.26; 3rd - 1.64;
4th - 1.18; 5th - 1.00; 6th - 0.83/0.79. There are two (2) production 6th gears; either one is permitted.
d. Alternate shift knobs are permitted.
e. Nomex or aftermarket fireproof shift boots are permitted. Removal of the factory rubber shift boot is not permitted.
f. No treating, coating, polishing or modification of any transmission or components are permitted.
g. Fluids and/or lubricants may be substituted with any lubricant.
h. Updating or backdating of transmissions from 2006–2015 is permitted; unmodified OE shifters must be retained. The use of short throw
shifters is prohibited.
i. An single inspection hole (not to exceed 1.5” in diameter) in the bottom of the bell housing is permitted for the sole purpose of technical
inspection of the flywheel. It is permitted to plug or tape over theat hole.
j. Transmission cooler(s) are permitted.
11. Differential
a. Only the Following differentials are allowed.
1. Mazda Motorsports, unmodified, Torsen limited slip differential – 0000-02-5564
2. OE, unmodified, limited slip differential - Mazda part # MS03-27-200B
3. OE, unmodified, open differential are permitted.
b. RX-8 differential mounting bracket (Mazda part # F151-39-730B) is permitted.
c. Mazda Comp diff bushings 0000-04-5510 is permitted (MX-5 diff mount)
d. Polishing, metal treatment or coating of differential or axle components are not
permitted.
e. Removal of metal/rubber isolator on the pinion flange is permitted.
f. Differential cooler(s) are permitted.
12. Suspension and Steering: Suspension
Modifications are limited to the addition of the Mazda Motorsports Spec MX-5 kit; details are as follows (including all
modifications permitted):
a. OE control arms are required; no modification is permitted.
b. Mazda Motorsports’ TSB MX-5-002 must be followed re: the rear shock thread protector found in the “Spec MX-5: Four Pillars”
page on MazdaMotorsports.com. The thread protector must measure 1.250”. (The TSB will not be applicable to the supply from
Mazda Motorsports received after 7.15.2020 as they will have the updated thread protector.)
c. Anti-roll bar links may be replaced with Mazda part # 0000-04-5597-KT
1. Cockpit adjustability is not permitted.
d. Mazda Motorsports’ competition sway bars are required, mounting guidelines:
1. Metal shims up to 1/8” total thickness are permitted between each anti-roll bar mount shackle and the stock mounting
point on the chassis.
2. One end of the sway bar(s) may be disconnected as a suspension tuning aid.
3. The bar must remain in place and be solidly attached to the suspension on one end.
4. Sway bar end links must be installed on the unmodified stock attachment points.
e. Camber, caster, and toe are unrestricted within the limits of the unmodified factory adjust- ments in conjunction with Mazda
Motorsports front offset bushing (part # 000-04-5407-NC).
f. Minimum ride height is unrestricted.
g. Nuts & bolts may be replaced by similar items performing the same fastening function(s).
h. Relocation or reinforcement of any suspension parts or mounting points is not permitted, with the following exceptions:
1. Addition of spacers or washers on a horizontal plane is permitted at the rear lower shock mount to the spindle per the
shock installation instructions.
2. Updating to RX-8 rear toe link and rear trailing arm is permitted. See Table 13 below.
Table 13: Permitted RX-8 Trailing Arm and Toe Link Part #s
Description Mazda Part #
RX-8 Trailing Arm F189-28-200A
RX-8 Toe Link F189-28-45XA
i. OE power steering pump with pulley (Mazda part # NE51-32-650D) is required; Mazda Motor- sports Power steering flow
restrictor PT#- 0000-04-5532 is permitted; no other modification is permitted.
j. OE power steering rack (Mazda part #: NE51-32-110C) is required; no modification or reloca- tion is permitted.
k. Factory power steering reservoir may be replaced.
l. Wheel center caps must be removed.
m. All chassis, structural and electrical repairs must follow factory procedures, specifications, and dimensions as described in the
applicable service manual. Reinforcement (e.g., seam welding, material addition, etc.) is not permitted.
n. Steering lock mechanisms must be removed.
o. The distance from the outside of the wheel rim to outside of the opposing wheel rim for both the front and rear of the vehicle
must not exceed 69.5”.
I. The distance Measurement is obtained by measuring the distance between the wheel lips by going through
the wheel spokes at the bottom of the wheel at its widest point via tape measure. (Measure the outside wheel
lip of one wheel to outside wheel lip of the other wheel on same axle.)
p. Mazda Motorsports’ competition rear toe link (part # 0000-04-5426) is permitted; no modification is permitted.
q. Mazda Motorsport’s Spec MX-5 Suspension Kit includes the items set forth in Items in Table
14. seen below are components within this kit. No substitutions or modifications of parts are permitted. The
unmodified kits must be used in their entirety, except as specified.
Table 14: Spec MX-5 Suspension Kit (All parts are required; no modification is permitted.)
Description Location Mazda Part #
Shocks Front 0000-04-5291-SA
Rear 0000-04-5292-SA
Springs Front 0000-04-9700-08
Rear 0000-04-9400-07
Helper Springs Front/Rear 0000-04-9926
Front Penske
Mount Kit Front 0000-04-5359
Rear Penske
Mount Kit Rear 0000-04-5358
Sway Bar Kit Front and Rear 0000-04-5306-EB
Offset Bushings Front 0000-04-5407-NC
13. Hubs
a. OE RX-8 front hub (Mazda part # F189-33-04X) may be substituted in place of the OE Miata 2006-2015 front hub.
b. Mazda Motorsports’ competition RX-8 rear hub upgrade kit (part # 0000-04-5811-KT) may be substituted in place of the OE MX-
5 rear hubs; this unmodified kit must be used in its entirety.
c. OE RX-8 rear uprights, bearings, hubs, and hybrid axel may be used in place of OE MX-5 parts.
14. Brakes
a. OE brake rotors must be used and adhere to the specifications below in Table 15.
Table 15: Brake Rotor Dimensions
Location Diameter Notes
Front 290mm (11.4”) Vented
Rear 280mm (11.0”) Solid
Front backing plates/dirt shields may be removed.
(see see red arrow in diagram below)
b. Rear backing plates/dirt shields may be removed.
(see red arrow in diagram below)
c. Brake lines may be replaced with competition braided steel lines; option: Mazda Motorsports’ part # 0000-03-5212.
d. The Factory ABS system must remain intact, unmodified, and in full working order.
e. Brake slider pin may be used in either/both front location B25D-33-694. (This prevents a stuck sliding caliper due to the rubber
grommet)
f. Parking brake mechanisms and actuating components may be removed.
g. Brake fluid is unrestricted.
h. Mazda Motorsports’ competition brake duct kit (part # 0000-03-5301) is permitted.
i. The forward vertical inner fender panels may be modified to fit the brake kit hose to the fog light openings but may not be
modified to serve any additional purpose.
j. Mazda Motorsports’ competition brake pads are required; see eligible brake pad compounds in Table 16. No other brake pads
are permitted.
Table 16: Brake Pad part numbers
Pad Style Mazda Part # Notes
Front Pad 0000-03-5104-SP RST-3 compound
Rear Pad 0000-03-5116-29 RSL-29 compound
15. Wheels
The following unmodified wheel options below in Table 17 are permitted for use.
Table 17: WHEELS
Description Color Mazda Part #
17x7” OE Wheel Gun Metallic 99656-47070
17x7” OE Wheel Silver 99656-77070
Mazda Motorsports’ Competition MX-5 Wheel Gun Metallic 0000-04-5706-GM
Mazda Motorsports’ Competition MX-5 Wheel Silver 0000-04-5706-SL
a. Wheels may be painted.
b. Aftermarket (any) wheel studs and lug nuts are permitted., provided that a minimum of two he threads must protrude
beyond the lug nut with the wheel installed with a minimum of two (2) full threads showing; Wheel studs may not be gun
drilled.
c. Wheel spacers are not permitted.
16. Tires
a. Dry tires: Toyo RR P235/40/ZR17
b. Wet tires: Toyo RA1 P235/40/ZR17.
17. Electrical Equipment
a. OE ignition coils (Mazda part # L3G2-18-100B) are required; no modification is permitted.
b. Mazda’s competition spark plugs (part # 0000-10-R7IX-11) are required; no modification is permitted.
c. The crankshaft position sensor and crankshaft pulley relationship must be as specified in the 2006- 2015 MX-5 Factory Service Manual.
d. One of the two OE alternators (Mazda part # LF9H-18-300R-OA, L3P9-18-300D) is required; no modification is permitted.
e. The alternator must not be externally regulated or disabled in any way other than by the OE
production ECU/wiring circuit and master kill switch.
f. The electronic control module (ECM) control circuit for alternator charging must be OE - unmodified and operational.
g. One of the two OE alternator drive pulley part # AJ51-18-W10 (60mm), Part# L813-18- W11(55mm) is required; no modification
is permitted.
h. All sensors related to engine operating parameters must be used and must be stock, unmodi- fied Mazda parts for the correct year
of the vehicle on which they are installed.
i. Any and all sensors and their respective locations, mounts, and wiring harness leads may not be altered except as elsewhere in this
rule set. e Spec-MX-5 rules.
j. Any sensors required for non-OE gauges must be in addition to the Mazda sensors.
k. All alternate gauge and sensors must have independent wiring. Splicing, tapping, or altering
of the factory engine wiring harnesses is prohibited with the exception of adding an
aftermarket tachom- eter/shift light as follows:
1. It is permitted to splice into the yellow wire with the black stripe (pin 2BA - Ignition
Coil 1 control circuit) in the engine harness to obtain the tachometer signal for an
aftermarket tachometer or shift light.
2. Splicing must be done within 5” of the ECU.
l. Data acquisition’s sensor(s) may be added, provided they do not require splicing or
alteration to the factory engine wiring harness.
m. Batteries
1. Batteries may be replaced with those of an alternate manufacturer, provided they are of
similar amp-hour capacity, and size, including lead acid or AGM.; lLithium batteries are not
permitted.
2. Batteries must weigh no less than 18.0lb and no more than 35.0lb
3. Additional battery hold-down devices are recommended.
4. Battery MUST be moved from the original location to the passenger side
in the upper trunk area in front of the tail lamp. This will require the use
of a bulkhead that separates the driver / passenger compartment
completely from the trunk and the battery location. See section 5.I for
reference.
18. Roll Cage
a. Roll cage must adhere to SCCA’s current GCR Section 9.4 for Touring 4 cars; with the following exceptions:
1. One tube not to exceed 1.75” in diameter may be added which extends from the door bars to the rocker panel on each side.
The landing plate for this tube can be no longer than 5” in length. The landing plates must be centered between the front
and rear landing plates for the lower NASCAR or X brace bar.
2. Main hoop mounting plates may be on multiple planes; however, they must not be greater than 19” on any side.
b. Playboy MX-5 Cup car cages manufactured by Racing Cages, Inc. with the official serial number plate on the main hoop are
allowed to retain the lower door bar and two 3” attachment points to the rocker panel on both the driver’s side and passenger
side. No additional seam welding or lengthening of the original attachment points is allowed.
19. Safety
a. An electrical master (“kill”) switch is required. See current GCR Section 9.3 Master Switch.
b. Vehicle must be equipped with a driver’s restraint system meeting the specifications of current GCR Section 9.3 Drivers
Restraint System.
c. Installation of a fire extinguisher or fire system is required. See current GCR 9.3 Fire System.
d. Vehicle must have a driver’s side window safety net complying with current GCR Section 9.3 Window Safety Nets. Nets must be
mounted to provide protection in the event the driver’s door opens.
20. Data
Acquisition
1 A technical evaluation process for cars is available from the Series. Part of this process is the required download of AiM Data files after
each timed session (Qualifying 1 & 2, Races 1 & 2). Within 30 minutes of each timed session end, all Series Competitors MUST send
the AiM Data file (.XRK) for all timed laps of that session to the secure email address (data@specmx-5.com), where data will be
reviewed by AiM directly. Failure to adhere to this guideline from the Series, or having non- functioning data, may be grounds for
penalty or disqualification by the Series.
a. Vehicle must be equipped with current generation AiM data acquisition system (configurable in Race Studio 3) that can provide
on track data to AiM race studio 3. The data acquisition system may only read the OBDII/ECU data stream. It is not permitted
to alter/manipulate data to and from the ECU. The AiM system may be utilized to trigger a switch I.E., cooling fans or diff cooler
pumps but must be wired via a separate analog circuit.
Refer to Section 17: Electrical Equipment above for installation requirements.
b. The connection at the OBDII port for the AiM system may be made in either one of two ways:
1. Through a dedicated OBDII AiM adaptor.
2. By direct wiring to the back of the OBDII port within 3” of the ODBII connector.
c. Fuel pressure datalogging is required.
d. Oil pressure datalogging is required.
e. All cars must run the latest AIM Data Logger Spec MX-5 ECU Protocol
21. Mandatory
Video
Camera
Cars running in Spec MX-5 must have a functioning video recorder/camera during all qualifying and race sessions as described in 9.3.11.
Upon request by an SCCA official, competitors must provide their video recording/data, which may be used by the SCCA for any
purpose including but not limited to rule enforcement and marketing. Failure to comply with a video request from an official, or
having a non-functioning video recorder/camera may will be grounds for penalty or disqualification.
22. Parts
Confiscation
a. Tech officials may confiscate competitors’ parts for the purpose of verification of tech compliance.
23. Penalties Clarification – Non-Compliant Parts
Level Infraction Penalty
1 Non-compliant modification to any of the spec
parts, engine components, ECU/Elec- tronics or
modification to the chassis.
May suspend the driver (i.e. suspend) of the non-
compliant Spec MX-5 from competing in SCCA
events for the 12 months following the suspension.
A level 1 infraction carries a $1,000 fine.
2
Non-compliant modification to the suspen- sion or
drivetrain outside of level one infrac- tions: engine,
fuel system, charging system, exhaust, and intake
system.
May suspend the driver (i.e. suspend) of the non-
compliant Spec MX-5 from competing in SCCA
events for the 6 months following the suspension.
A level 2 infraction carries a $500 fine.
3 Use of an unauthorized or non-compliant part,
engine component, ECU/Electronics or chassis or
chassis part.
May suspend the driver (i.e. suspend) of the non-
compliant Spec MX-5 from competing in SCCA
events for the 12 months following the suspension.
A level 3 infraction carries a $1,000 fine
4
Non-compliance (non-modification such as
incorrect part)Use of an unauthorized or non-
compliant for any of the suspension or drive- train
part or component outside of level one infractions:
engine, fuel system, charging system, exhaust, and
intake system.
May suspend the driver (i.e. suspend) of the non-
compliant Spec MX-5 from competing in SCCA
events for the 6 months following the suspension.
A level 4 infraction carries a $500 fine

In T3 Spec Lines, change Notes as follows:
Ford Mustang Coupe GT & Shelby GT 4.6L & Cal. Special (05-10): "Alternate driveshaft is allowed."
Ford Mustang V6 (11-14): "Alternate driveshaft is allowed."
Ford Mustang V6 (05-10): "An Aluminum driveshaft is allowed."

rolled through a powdered substance, as raced with driver, in order to indicate the tire tread contact patch under static
conditions. When a maximum tire size is listed on a vehicle’s specification line, aspect ratio is open and any tire may be used that
does not exceed the stated maximum section width.
c. Cars equipped with lug bolts may convert to wheel studs and lug nuts.
d. Wheel studs may be replaced with longer studs as necessary to fit optional wheels. Wheel spacers may be used for purposes
of adjusting track.
e-T4 only: (unless specified on spec line) Any aftermarket wheel with a minimum weight of 15 lbs allowed."

w. Instrument clusters must be unmodified parts."

the front fascia. The stock headlamp location is not permitted for brake ducting. Two alternative duct openings may be created
by the removal of the fog lights or 2 sections up to 14.5 square inches each of stock false grills originally located in the front
fascia.
6. Stock replacement brake rotors may be obtained from sources other than the manufacturer provided they are the exact
equivalent of the stock rotors. In T2 only - 2-piece rotors with ferrous metal rotor disks and aluminum hats are allowed, must be
within 5% of OE diameter. In T3 only - 2-piece front rotors with ferrous metal rotor disks and aluminum hats are allowed, must
be within 2% of OEM diameter. Drilled and slotted rotors are permitted.
7. Parking brakes, mechanisms, and actuating components may be removed.
8. Brake vacuum reservoirs sized 0.50 gallons or smaller are permitted. The port or fitting at the vacuum source may not be
modified, enlarged or relocated. The vacuum reservoir and brake booster must be a closed system."

5407 or 0000-06-5407-NC. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda
hardtop and part #0000-07-5901- CC. Aftermarket power steering reservoir is allowed. Mazda Transmission kit part # 0000-02-
5700. Mazda Motorsports LSD #3265 5 0000-02-5564 permitted without penalty. Any other non-OEM limited slip differential
allowed with +50 lbs. weight penalty. Front spoiler permitted (NF51-V4-900F)."

Ford Fiesta Hatchback (11-19): "2470 39"
Ford Fiesta Sedan (11-19): "2470 38"
Honda Fit MT (07-08): "2450"
Honda Fit AT (07-08): "2450"
Honda Fit MT (09-14): "2500"
Honda Fit AT (09-14): "2500"
Honda Fit MT (15-19): "2530 31"
Honda Fit CVT (15-19): "2530 33"
Hyundai Accent Hatchback (12-19): "2570 41"
Kia Rio Hatchback (12-19): "2570 41"
Mazda2 (10-14): "2490"
Mini Cooper Hatchback (R50) MT (02-06): "2466"
Mini Cooper Hatchback (R50) CVT (02-06): "2466"
Mini Cooper (R56) MT (07-10): "2466 44 (OE Catalyst) 40 (Header)"
Mini Cooper (R56) AT (07-10): "2466 46 (OE Catalyst 42 (Header)"
Mini Cooper Clubman (R55) (07-10): "2547 44 (OE Catalyst) 40 (Header)"
Mini Cooper (R56LCI) MT (11-13): "2466 43"
Mini Cooper (R56LCI) AT (11-13): "2466 43"
Mini Cooper Clubman (R55) (11-15): "2547 42"
Mini Cooper Coupe (R58) (12-15): "2466 42"
Nissan Micra Cup Cars (Canadian): "2450"
Nissan Versa Sedan (2012-2019): "2600"
Nissan Versa Hatchback (2012-2019): "2600"
Nissan Versa (2020-): "2618 38"
Toyota/Scion IA Sedan (16-20): "2570 38"
Toyota Yaris Hatchback (07-11): "2461 42"
Toyota Yaris Hatchback (12-18): "2510 42"
Toyota Yaris Sedan (07-12): "2550 41"

Honda Civic Type-R (2017-)
Saturn Sky / Convertible (07-09)"
In T3, Effective 1/1/2025, delete for following Spec Lines in their entirety:
"Audi TTS Coupe (10-11)
Cadillac ATS (2015)
Chevrolet Cobalt (05-07)
Dodge SRT-4 (03-05)
Ford Fiesta ST (2014-)
Hyundai Genesis Coupe (2010-)
Hyundai Veloster Turbo (18-21)
Mini Cooper S (2016-)
Toyota Camry (11-15)"
In T4, Effective 1/1/2025, delete for following Spec Lines in their entirety:
"Acura Integra GS-R VTEC (3 or 4 door) (94-01)
Audi A4 V-6 (96-01) / Volkswagen Passat 2.8 V6 (96-05)
Chevrolet Cobalt SS, Sport Coupe (06-10)
Chevrolet Sonic RS (2011-)
Chrysler/Dodge Neon ACR SOHC (4 door) (01-02)
Dodge Dart (14-15)
Dodge/Plymouth Neon ACR SOHC/DOHC (2/4 door) (95-99)
Fiat 500 Abarth (12-14)
Ford Focus SVT (02.5-04)
Ford Focus ZX4 ST (05-06)
Ford Focus (08-11)
Ford Mustang V-6 (01-04)
Honda Accord LX & EX (03-07)
Honda Accord LX-S/EX/EX-L (08-12)
Honda Civic Coupe Si (99-00)
Honda Civic SI (02-03)
Hyundai Elantra GLS (11-12)
Hyundai Tiburon V-6 (03-08)
Hyundai Veloster Turbo/ R-Spec (14-15)
Kia Forte Koup and Sedan LX/EX (10-13)
Kia Forte Koup and Sedan SX (10-13
Kia Forte Koup (14-15)
Mazda Protégé ES (2000)
Mazda Protégé 5 (02-03)
Mazda6 s (03-07)
Mitsubishi Eclipse GT (00-05)
Nissan Sentra SER (02-03)
Pontiac Firebird V-6 (96-02)
Scion tC (03-07)
Subaru Impreza (non-turbo) (04-06)
Toyota Celica GT (00-05)
Toyota Celica GTS/GT (00-05)
Volkswagen Golf TDI (2010)
Volkswagen Passat (12-14)
Volkswgen Passat TDI (12-14)
Volkswgen Passat 1.8T (2014-)"

not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that
performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be
submitted."
In B-Spec Spec Lines, Honda Fit CVT (15-19), change Notes as follows:
"Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81, Damper RR 52610F23SA80, Spring adjust assy RR
52691F23SA80, Camber Adjuster Comp, Damper 51920F23SA82. Exhaust pipe assy 18300F23SA81, ACG belt (6PK858)
31110FC4YA80. Allow rear sway bar Progress 62.1063. Allow Setrab 50- 119-7612 transmission cooler in addition to OEM."
In B-Spec Spec Lines, Mazda2 (10-14), change Notes as follows:
"Helper springs F&R 0000-04-9926, Spring spacer F&R 0000-04-9925, Rear sway bar 0000-04-2203-RR or 0000-04-
2312, Modified strut bearing plate 0000-04-2204, Crash bolt set 0000-04-2205, Allow rear torque bar Corksport #Mz2-3-070.
Cold air intake Corksport Mz2-6-117-31100 and air duct Mz2-6-120-10 are allowed. Exhaust Header (cat delete) HB.EM 60-404-
S-SS, HP-MZD001, or Mazda Motorsports PN 0000- 06-2410 permitted. Powerflex PFR19-1511BX2 rear suspension bushings
allowed. Allow Mazda part number 0000-01-2501-CR Radiator. Allow Mazda undertray part number DO8C-56-110A, DO8C-56-
311, DO7A-56-321."
In B-Spec Spec Lines, Mini Cooper Hatchback (R50) MT (02-06), change Notes as follows:
"Allow KW: Coilover Kit: Variant 2: Gen 1 or KW equivalent, Vorshlag Mini R50/53 Camber Plates & Perches allowed. Ride height
measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Allow rear
sway bar Progress #62.0210."
In B-Spec Spec Lines, Mini Cooper Hatchback (R50) CVT (02-06), change Notes as follows:
"Allow KW: Coilover Kit: Variant 2: Gen 1 or KW equivalent, Vorshlag Mini R50/53 Camber Plates & Perches allowed. Ride height
measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Allow rear
sway bar Progress #62.0210.CVT equipped cars allow Setrab 50-119-7612 transmission cooler in addition to OEM."
In B-Spec Spec Lines, Toyota Yaris Hatchback (07-11), change Notes as follows:
"PTR04-52061 TRD Sport shocks permitted. PTR11-52070 TRD spring kit permitted. Speed sensor may be disconnected. Cold air
intake K&N 69-8612TFK is allowed. Rear Swaybar PTR11-52071 is allowed. Any Camber plate is permitted."

**2205 2258"
Volkswagen Jetta (GLI, GL) (85-92)
"(Effective 3/1/2025) 2100 2150
*2153 2204
**2205 2258"
Volkswagen Rabbit 1780
"(Effective 3/1/2025) 2100 2150
*2153 2204
**2205 2258"
Volkswagen Scirocco 1780 (8-valve) (83-88)
"(Effective 3/1/2025) 2100 2150
*2153 2204
**2205 2258"

Mini Cooper (R56LCI) MT (11-13): "43 4 FPR"
Mini Cooper (R56LCI) AT (11-13): "45 6 FPR (OE Catalyst)"
Mini Cooper Clubman (R55) (11-15): "42 4 FPR"
Nissan Versa Sedan (12-19): "2490 2450" "Allow Injen intake SP1906"
Nissan Versa Hatchback (12-19): "2490 2450" "Allow Injen intake SP1906"
Toyota Yaris Hatchback (12-18): "2400 2350"
Toyota Yaris Sedan (07-12): "2400 2350"

for all SM competitors will occur after the first dry qualifying or race session. All tires will be marked for the remainder of the
race weekend. It is the competitor’s responsibility to report to impound and ensure their tires are marked prior to leaving
impound.
3. If a competitor damages a tire or wheel, and there is a safety concern, the competitor must find the Hoosier Super Tour Series
Tech Chief or SM CCC, if assigned, for inspection. At the direction of the Hoosier Super Tour Series Tech Chief or SM CCC, the
competitor will be allowed to substitute alternate used tire(s) to replace the damaged tire(s). New tires are not an option as a
replacement tire for a damaged tire If a competitor damages a tire or wheel and there is a safety concern, the competitor must
find the Hooseir Super Tour Series Tech Chief or SMX CCC, if assigned, for inspection. At the discretion of the Hoosier Super
Tour Series Tech Chief of SMX CCC the competitor may be allowed to substitute alternate used tires(s) to replace the damaged
tire(s). New tires are not an option as a replacement tire for a damaged tire."

from converting to rear disc brakes under this rule.
3. The “Brakes Std.” and “Brakes Alt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes
as stock from converting to rear disc brakes under this rule."

0000-06-5410 allowed."
In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), change Notes as follows:
"Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. Retractable hardtop option permitted
but must be disabled from moving action and positively fastened. Any OEM or aftermarket hardtop is permitted that retains the
OEM roof silhouette, including Mazda hardtop part #0000-07-5902-ND and part #0000-07-5901 (discontinued DG Motorsports).
29mm (f) 16mm (r) sway bars allowed. Up to 500lb front and 300lb rear springs allowed. Mazda Motorsports Header part
#0000-06-5410 allowed. Mazda tower brace 0000-04-5626 allowed. 3rd and 4th gear may be replaced with the following parts-
(0000-02-5803-02, 0000-02-5803-01, 0000-02-5804-02, 0000-02-5."
In T3 Spec Lines, Mazda MX-5 Miata (16-18), change Notes as follows:
"Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. Header permitted. Cold air intake
permitted. Front strut brace permitted. Front and rear sway bars permitted up to 35mm, Springs 800 front and 800 Rear max
permitted. Any OEM or aftermarket hardtop permitted that retains the OEM roof silhouette including Mazda hardtop part
#0000-07-5902- ND and part #0000-07-5901 (discontinued DG Motorsports top). If a hardtop is used, latches shall be replaced
with positive fasteners. Retractable hardtop option permitted but must be disabled from moving action and positively fastened.
In T3 Spec Lines, Mazda MX-5 Global Cup Miata (2016-2021) ND1, ND, change Notes as follows:
"Shoulder harness installation must conform to FIA mounting specifications that are approved for this vehicle per section 6.2 FIA
article 253, safety equipment. Must meet all ND2 MX-5 Global Cup rules. Any OEM or aftermarket hardtop is permitted that
retains the OEM roof silhouette, including Mazda hardtop Mazda hardtop part #0000-07-5902-ND and #0000-07-5902-ND part
#0000- 07-5901 (discontinued DG Motorsports). If a hardtop is used, latches shall be replaced with positive fasteners. OBD2
requirement does not apply. Ballast box may be removed. ND2s with sequential gearbox allowed +100 lbs.

Tire size: "225 245"
Weight: "3250 3150"
In T4 Spec Lines, Ford Mustang V6 (05-14), change as follows:
Restrictor: "50mm 43mm"
Weight: "3300 3400"
In T4 Spec Lines, Honda Civic Si (06-11), change Restrictor as follows:
"55mm"
In T4 Spec Lines, Honda Civic Si (12-15), change as follows:
Restrictor: "47mm 52mm
Notes: "Transmission and Differential must be stock."
In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change as follows:
Weight: "2550 2500"
Notes: "Factory bolt-in roll bar/cross member may be removed to facilitate roll cage installation. MSR option permitted.
Suspension package permitted with a 100 lbs. weight increase that includes the following parts: front spring mount PT#-0000-
04-5259, front springs #0000-04-9700-08, rear spring mount PT#-0000-04-5258, rear springs #0000- 04-9400-07, helper springs
#0000-04-HLPR-EB (optional), Swaybar kit – PT#-0000-04-5306-EB that includes (front sway bar kit PT#0000-04-5306-FT, rear
sway bar kit PT#-0000-04-5306-RR), offset front camber bushing PT#- 0000-04-5407-NC. Mazda Motorsports cold air intake part
#0000-06-5150-KT allowed. Mazda Motorsport RX8 rear Hub Conversion kit part number 0000-04-5811-KT allowed, RX8 front
hubs PT# F189-33-04X allowed. Allow Mazda header part numbers 0000-06-5407 or 0000-06-5407-NC. Any OEM or aftermarket
hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop and part #0000-07-5901-CC. Aftermarket
power steering reservoir is allowed. Mazda Transmission kit part # 0000-02-5700. Mazda Motorsports LSD #32655 permitted
without penalty. Any other non-OEM limited slip differential allowed with +50 lbs. weight penalty. Front spoiler permitted
(NF51-V4-900F). Transmission kit # 0000-02-57
In T4 Spec Lines, Pontiac Solstice / Saturn Sky (06-09), change as follows:
Weight: "2800 2700"
Brakes: "(F) 296 315 Vented Disc max (R) 278 Solid Disc"
Notes: "GM calipers #22720705, and #25900764 permitted"
In T4 Spec Lines, Scion FRS/10 series (13-16), change Weight as follows:
"2925 2875"
In T4 Spec Lines, Subaru BRZ/ BRZ Limited (13-16), change Weight as follows:
"2925 2875"
In T4 Spec Lines, Subaru BRZ (17-21), change Weight as follows:
"3000 2950"
In T4 Spec Lines, Toyota 86, GT (17-21), change Weight as follows:
"3000 2950"
SCCA Runoffs

In EP Spec Lines, BMW Z3 2.5L, change Weight as follows:
"2500 2550
*2563 2614
**2625 2678"

Fabrication brake caliper piston SNC-SS. Approved parts: ZZ Performance rear sway bar ZZ-SNCRSB, ZZ Performance radiator ZZP-
ZZ013, Babyface Fabrication brake caliper piston SNC-SS, Setrab transmission cooler 50-119-7612. Bilstein B14 kit 47-171725
verified compatible. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate
Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an
AIM or similar device must be submitted."
In B-Spec Spec Lines, Chevrolet Sonic Hatchback MT (12-19), change Notes as follows:
"GM suspension kit #23123679 permitted. Bilstein B14 kit #47-171725 verifed compatible. Allow rear sway bar ZZ Performance
#ZZ-SNCRSB. Allow Aluminum Radiator #ZZP-ZZ013. Allow Babyface Fabrication brake caliper piston SNC-SS. Approved parts: ZZ
Performance rear sway bar ZZ-SNCRSB, ZZ Performance radiator ZZP-ZZ013, Babyface Fabrication brake caliper piston SNC-
SS. World Challenge suspension kit permitted but no longer available. Bilstein B14 kit 47-171725 verified compatible."
In B-Spec Spec Lines, Chevrolet Sonic Hatchback AT (12-19), change Notes as follows:
"GM suspension kit #23123679 permitted. Bilstein B14 kit #47-171725 verifed compatible. Allow rear sway bar ZZ Performance
#ZZ-SNCRSB. For automatic allow Setrab 1-series Part No. FP119M221. Allow Aluminum Radiator #ZZP-ZZ013. Allow Babyface
Fabrication brake caliper piston SNC-SS. Approved parts: ZZ Performance rear sway bar ZZ-SNCRSB, ZZ Performance radiator ZZP-
ZZ013, Babyface Fabrication brake caliper piston SNC-SS, Setrab transmission cooler 50-119-7612. Bilstein B14 kit #47-171725
verified compatible. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate
Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an
AIM or similar device must be submitted."
In B-Spec Lines, Ford Fiesta Hatchback (11-19), change Notes as follows:
"Suspension kit #M-FR3-FAEB allowed. Rear axle bushing #000-04-2203-RR allowed. Allow rear torque bar Corksport #Mz2-3-
070. Cold air intake K&N 69-3530TS is allowed. Powerflex PFR19-1511BX2 rear suspension bushing allowed. Eibach rear sway bar
#35143.312 o r35143.320 is allowed. Mazda front hub D651-33-06 and rear hub D651-26-15XE allowed. Approved parts: Eibach
rear sway bar 35143.312, Corksport rear torque bar MZ2-3-070, K&N intake 69-3530TS, Powerflex rear suspension bushing
PFR19-1511BX2, Mazda front hub D651-33-06, Mazda rear hub D651-26-15XE."
In B-Spec Spec Lines, Ford Fiesta Sedan (11-19), change Notes as follows:
"Suspension kit #M-FR3-FAEB allowed. Rear axle bushing #000-04-2203-RR allowed. Allow rear torque bar Corksport #Mz2-3-
070. Cold air intake K&N 69-3530TS is allowed. Powerflex PFR19-1511BX2 rear suspension bushing allowed. Eibach rear sway bar
#35143.312 o r35143.320 is allowed. Mazda front hub D651-33-06 and rear hub D651-26-15XE allowed. Approved parts: Eibach
rear sway bar 35143.312, Corksport rear torque bar MZ2-3-070, K&N intake 69-3530TS, Powerflex rear suspension bushing
PFR19-1511BX2, Mazda front hub D651-33-06, Mazda rear hub D651-26-15XE."
In B-Spec Spec Lines, Honda Fit MT (07-08), change Notes as follows:
"Bilstein B14 kit 47172401 verified compatible. Allow rear sway bar Progress #62.1060. Allow Injen Intake SP1511 OEM exhaust
manifold required. Primary catalyst may be removed. Allow Torque Solution Shifter Cable Bushing kit TS-SCB-506. Approved
parts: Progress rear sway bar 62.1060, Injen intake SP1511, Torque Solution shifter cable bushings TS-SCB-506. Bilstein B14 kit
47172401 verified compatible. OEM exhaust manifold required. Primary catalyst may be removed."
In B-Spec Spec Lines, Honda Fit AT (07-08), change Notes as follows:
"Bilstein B14 kit 47172401 verified compatible. Any aftermarket header allowed. Allow rear sway bar Progress # 62.1060. Any
Cold Air Intake Package allowed (any manufacturer). Approved parts: Progress rear sway bar 62.1060, Injen intake SP1511,
Setrab transmission cooler 50-119-7612, any aftermarket header. Bilstein B14 kit 47172401 verified compatible."
In B-Spec Spec Lines, Honda Fit MT (09-14), change Notes as follows:
"Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH 51606F23SA100, Damper RR
52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200, 51402FC4YA00 front helper spring
and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is allowed. Allow rear sway bar Progress
# 62.1061 Allow Injen Intake SP1512, K&N Intake 69-1017TTK, or HPS intake 827-102 with a 25lb adder. Allow Acuity Shifter
Base Bushing Kit 1954 Two pedal shutdown may be disabled by cutting/de-pinning pin 42 (BKSW) at the main ECU connector in
the engine bay. Approved parts: Progress rear sway bar #62.1061, Injen Intake SP1512, K&N Intake 69-1017TTK, or Weapon R
Intake 301-166-301, Acuity shifter bushing kit 1954. World Challenge suspension kit permitted but no longer available. Two pedal
shutdown may be disabled by cutting/de-pinning pin 42 (BKSW) at the main ECU connector in the engine bay."
In B-Spec Spec Lines, Honda Fit AT (09-14), change Notes as follows:
"Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH 51606F23SA100, Damper RR
52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200, 51402FC4YA00 front helper spring
and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is allowed. Allow rear sway bar Progress
# 62.1061. Allow Setrab 50-119-7612 transmission cooler in addition to OEM. Any aftermarket exhaust/header allowed. Any
Cold Air Intake Package allowed (any manufacturer). Weapon R Intake 301-166-301. Approved parts: Progress rear sway bar
62.1061, Injen Intake SP1512, any aftermarket header, Setrab transmission cooler 50-119-7612. Two pedal shutdown may be
disabled by cutting/de-pinning pin 42 (BKSW) at the main ECU connector in the engine bay."
In B-Spec Spec Lines, Honda Fit MT (15-19), change Notes as follows:
"Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81, Damper RR 52610F23SA80, Spring adjust assy RR
52691F23SA80, Camber Adjuster Comp, Damper 51920F23SA82. Allow rear sway bar Progress 62.1063. Approved parts: Progress
rear sway bar 62.1063."
In B-Spec Spec Lines, Honda Fit CVT (15-19), change Notes as follows:
"Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81, Damper RR 52610F23SA80, Spring adjust assy RR
52691F23SA80, Camber Adjuster Comp, Damper 51920F23SA82. Allow rear sway bar Progress 62.1063. Allow Setrab 50-119-
7612 transmission cooler in addition to OEM. Approved parts: Progress rear sway bar 62.1063, Setrab transmission cooler 50-
119-7612. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate
Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an
AIM or similar device must be submitted."
In B-Spec Spec Lines, Hyundai Accent Hatchback (12-17), change Notes as follows:
"Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-ASTRear; KSJ03-20-003 Rear Upper Spring Perch Delrin;
AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B8 shock 33- 187112 approved for
use in rear suspension. Bilstein B14 kit #47167490 front shocks verified compatible. Allow BabyFace Fabrication sump extension
#BF-HYU-PAN Vehicles equipped with rear drum brakes subtract 25 lb. Approved parts: Evilla Motorsports rear torque bar KR-B1,
BabyFace Fabrication sump extension BF-HYU-PAN. Vehicles equipped with rear drum brakes subtract 25 lbs."
In B-Spec Spec Lines, Hyundai Accent Sedan (12-17), change Notes as follows:
"Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-AST-Rear; KSJ03-20- 003 Rear Upper Spring Perch Delrin;
AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B8 shock 33-187112 approved for
use in rear suspension. Approved parts: Evilla Motorsports rear torque bar KR-B1, BabyFace Fabrication sump extension BF-HYU-
PAN. Vehicles equipped with rear drum brakes subtract 25 lbs."
In B-Spec Spec Lines, Kia Rio Hatchback (12-15), change Notes as follows:
"Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-AST-Rear; KSJ03-20- 003 Rear Upper Spring Perch Delrin;
AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B14 kit #47167490 front shocks
verified compatible. Allow BabyFace Fabrication sump extension #BF-HYU-PAN Bilstein B8 shock 33-187112 approved for use in
rear suspension. Approved parts: Evilla Motorsports rear torque bar KR-B1, BabyFace Fabrication sump extension BF-HYU-PAN.
World Challenge suspension kit permitted but no longer available."
In B-Spec Spec Lines, Kia Rio Sedan (12-17), change Notes as follows:
"Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-AST-Rear; KSJ03-20- 003 Rear Upper Spring Perch Delrin;
AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B8 shock 33-187112 approved for
use in rear suspension. Approved parts: Evilla Motorsports rear torque bar #KR-B1, BabyFace Fabrication sump extension BF-HYU-
PAN."
In B-Spec Spec Lines, Mazda2 (10-14), change Notes as follows:
"Rear sway bar 0000-04-2203-RR or 0000-04-2312, Allow rear torque bar Corksport #Mz2- 3-070. Cold air intake Corksport Mz2-
6-117-31100 and air duct Mz2-6-120-10 are allowed. Exhaust Header (cat delete) HB.EM 60-404-S-SS, HP-MZD001, allowed with
a 50lb adder or Mazda Motorsports PN 0000-06-2410 with no weight adder permitted. Powerflex PFR19- 1511BX2 rear
suspension bushings allowed. Allow Mazda part number 0000-01-2501-CR Radiator. Allow Mazda undertray part number DO8C-
56-110A, DO8C-56-311, DO7A-56-321. Approved parts: Mazda Motorsports rear sway bar 0000-04-2203-RR, Eibach/Mazda
Motorsports rear sway bar 35143.312/0000-04-2312, Corksport rear torque bar #MZ2- 3-070, Corksport intake MZ2-6-117-
31100, Corksport air duct MZ2-6-120-10, Powerflex PFR19-1511BX2 rear suspension bushings, Mazda Motorsports radiator
0000-01-2501-CR, Mazda Motorsports header 0000-06-2410, Mazda undertray/side shields DO8C-56-110A, DO8C-56-311, DO7A-
56-321."
In B-Spec Spec Lines, Mini Cooper Hatchback (R50) MT (02-06), change Notes as follows:
"Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Allow rear sway bar Progress #62.0210. Approved parts: Progress rear sway bar 62.0210, Mevotech leteral link CMK100003. Ride
height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches."
In B-Spec Spec Lines, Mini Cooper Hatchback (R50) CVT (02-06), change Notes as follows:
"Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Allow rear sway bar Progress #62.0210.CVT equipped cars allow Setrab 50-119-7612 transmission cooler in addition to
OEM. Approved parts: Progress rear sway bar 62.0210, Mevotech leteral link CMK100003, Setrab transmission cooler 50-119-
7612. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5
inches."
In B-Spec Spec Lines, Mini Cooper (R56) MT (07-10), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header part #10-
2101-2S permitted. Approved parts: Progress rear sway bar 62.0210, OBX header 10-2101-2S. Ride height measured from the
metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
In B-Spec Spec Lines, Mini Cooper (R56) AT (07-10), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1
125.Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5
inches. Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header
part #10-2101-2S permitted. Automatic equipped cars only allow Setrab 50-119-7612 transmission cooler in addition to
OEM. Approved parts: Progress rear sway bar 62.0210, Setrab transmission cooler 50-119-7612. Ride height measured from the
metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. This configuration is not currently
eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance data can be
collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
In B-Spec Spec Lines, Mini Cooper Clubman (R55) (07-10), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header part #10-
2101-2S permitted. Approved parts: Progress rear sway bar 62.0210, OBX header 10-2101-2S. Ride height measured from the
metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
In B-Spec Spec Lines, Mini Cooper (R56LCI) MT (11-13), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. Approved parts:
Progress rear sway bar 62.0210. Ride height measured from the metal underneath the bottom of the plastic door rocker molding
shall be no less than 5 inches."
In B-Spec Spec Lines, Mini Cooper (R56LCI) AT (11-13), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header part #10-
2101-2S permitted with 41mm FPR. Automatic equipped cars only allow Setrab 50- 119-7612 transmission cooler in addition to
OEM. Approved parts: Progress rear sway bar 62.0210, Setrab transmission cooler 50-119-7612. Ride height measured from the
metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. This configuration is not currently
eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance data can be
collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
In B-Spec Spec Lines, Mini Cooper Clubman (R55) (11-15), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. Approved parts:
Progress rear sway bar 62.0210. Ride height measured from the metal underneath the bottom of the plastic door rocker molding
shall be no less than 5 inches."
In B-Spec Spec Lines, Mini Cooper Coupe (R58) (12-15), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. Approved parts:
Progress rear sway bar 62.0210. Ride height measured from the metal underneath the bottom of the plastic door rocker molding
shall be no less than 5 inches."
In B-Spec Spec Lines, Nissan Versa Sedan (2012-2019), change Notes as follows:
"Hardrace HR-Q0146 19mm rear sway bar permitted. Allow Injen intake SP1906. Approved parts: Hardrace rear sway bar HR-
Q0146, Injen intake SP1906."
In B-Spec Spec Lines, Nissan Versa Hatchback (2012-2019), change Notes as follows:
"Hardrace HR-Q0146 19mm rear sway bar permitted. Allow Injen intake SP1906. Approved parts: Hardrace rear sway bar HR-
Q0146, Injen intake SP1906."
In B-Spec Spec Lines, Nissan Versa (2020-), change Notes as follows:
"This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour
weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar
device must be submitted. This configuration is not currently eligible for Runoffs competition. This car must compete in three
separate Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected
via an AIM or similar device must be submitted."
In B-Spec Spec Lines, Toyota/Scion IA Sedan (16-20), change Notes as follows:
"This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour
weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar
device must be submitted. Allow ST Suspension Kit 1327502. Approved parts: ST suspension kit 1327502. This configuration is not
currently eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance
data can be collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
In B-Spec Spec Lines, Toyota Yaris Hatchback (07-11), change Notes as follows:
"Speed sensor may be disconnected. Cold air intake K&N 69-8612TFK is allowed. Rear Swaybar PTR11-52071 is allowed.
Approved parts: TRD rear sway bar PTR11-52071, K&N intake 69-8612TFK. Speed sensor may be disconnected."
In B-Spec Spec Lines, Toyota Yaris Hatchback (12-18), change Notes as follows:
"Rear Swaybar PTR11-52071 is allowed. Cold air intake K&N 69-8612TFK is allowed. Speed sensor may be disconnected. Vehicles
equipped with rear disc brakes add 25 lb. Approved parts: TRD rear sway bar PTR11-52071, K&N intake 69-8612TFK. Speed
sensor may be disconnected. Vehicles equipped with rear disc brakes add 25 lbs."
In B-Spec Spec Lines, Toyota Yaris Sedan (07-12), change Notes as follows:
"Rear Swaybar PTR11-52071 is allowed. Cold air intake K&N 69-8612TFK is allowed. Speed sensor may be disconnected.
Approved parts: TRD rear sway bar PTR11-52071, K&N intake 69-8612TFK. Speed sensor may be disconnected."

Restrictor (mm) & Type: "33 FPR"
Mini Cooper Hatchback (R50) MT (02-06):
Weight (lbs): "2545 2525"
Mini Cooper (R56) MT (07-10):
Restrictor (mm) & Type: "FPR 45 47 OE Catalyst"
Mini Cooper (R56) AT (07-10):
Restrictor (mm) & Type: "47 FPR (OE Catalyst) 42 FPR (Header)"
Mini Cooper Clubman (R55) (07-10):
Restrictor (mm) & Type: "FPR 45 47 OE Catalyst"
Mini Cooper (R56LCI) MT (11-13):
Restrictor (mm) & Type: "FPR 44 46"
Mini Cooper (R56LCI) AT (11-13):
Restrictor (mm) & Type: "46 FPR (OE Catalyst) 41 FPR (Header)"
Mini Cooper Clubman (R55) (11-15):
Restrictor (mm) & Type: "FPR 44 46"
Nissan Versa Sedan (2012-2019):
Min weight: "2450 2425"
Nissan Versa Hatchback (2012-2019):
Min weight: "2450 2425"
Nissan Versa (2020-):
Restrictor (mm) & Type: "38 FPR"
Toyota/Scion IA Sedan (16-20):
Restrictor (mm) & Type: "38 FPR"

are permitted to facilitate its installation. An Aluminum driveshaft is allowed. Any LSD permitted. Ford brake kit M-2300-D
allowed. Aftermarket header allowed. GT 8.8 rear axle assembly allowed. 3.45 or 3.55 Alternate final drive ratio allowed. 7.5
rear axle assembly with 3.45:1 final drive allowed. Cold Air Intake allowed. Koni part numbers 8741-1494SPORT (front) and
8241-1240SPORT (rear). Spec clutch #SF661 and flywheel #SF66A permitted. 14” Brembo Brake Kit#M-2300-S permitted."

"1300 Valves: (I) 33.0/(1.30) (E) 29.7/(1.17)
1500 Valves: (I) 36.6/(1.44) (E) 29.7/(1.17)
1300: Comp. ratio 12.0:1, Valve lift .450”
1500: Comp. ratio 11.0:1, Valve lift .450”
Trans. Speeds: 4"

bushings. Adjustable toe links with spherical bearings are permitted and may serve no purpose other than adjusting toe
angle. Adjustable toe links are permitted. They are allowed to have performance alternative bushings and spherical bearings.
They may serve no purpose other than adjusting toe angle. Spherical bearings/bushings are not permitted in T2-T4 except for the
specific examples listed in the class rules or vehicle spec line."

Ford Focus Hatchback/Sedan (2011-18):
"Allow BC Racing E-21-BR or RedShift E-21-CSPEC kit. Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved
parts: BC Racing E-21-BR or RedShift E-21-CSPEC suspension kit, Corksport Axl-3-318-Black adjustable rear camber
arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline BMR78XZ rear sway bar."
Honda Civic Coupe/Sedan (2012-15):
"Allow BC Racing A-58-BR or RedShift A-18-CSPEC kit. Approved parts: BC Racing A-58-BR or RedShift A-18-CSPEC suspension kit,
Progress 62.1026 or Megan Racing MRS-HA-0791 rear sway bar."
Honda Civic Coupe/Sedan (2006-11):
"Allow BC Racing A-18-BR or RedShift A-58-CSPEC kit. Approved parts: BC Racing A-58-BR or RedShift A-18-CSPEC suspension kit,
Progress 62.1026 or Megan Racing MRS-HA-0791 rear sway bar."
Mazda3i SKYACTIV (2012-13):
"Allow BC Racing N-03-BR or RedShift N-03-CSPEC kit. Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved
parts: BC Racing N-03-BR or RedShift N-03-CSPEC suspension kit, Corksport Axl-3-318-Black adjustable rear camber
arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline BMR78XZ rear sway bar."
Mazda 3i MZR (2010-13):
"Allow BC Racing N-03-BR or RedShift N-03-CSPEC kit. Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved
parts: BC Racing N-03-BR or RedShift N-03-CSPEC suspension kit, Corksport Axl-3-318-Black adjustable rear camber
arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline BMR78XZ rear sway bar."
Mazda 3i (2004-09):
"Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved parts: BC Racing N-03-BR or RedShift N-03-CSPEC
suspension kit, Corksport Axl-3-318-Black adjustable rear camber arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline
BMR78XZ rear sway bar."
Toyota Corolla (2007-12):
"Allow BC Racing C-02-BR or RedShift C-02-CSPEC kit. Approved parts: BC Racing C-02-BR or RedShift C-02-CSPEC suspension kit,
TRD PTR11-12080 or Megan Racing MRS-TY-1710 rear sway bar."
Toyota Corolla (2013-18):
"Allow BC Racing C-02-BR or RedShift C-02-CSPEC kit. Approved parts: BC Racing C-02-BR or RedShift C-02-CSPEC suspension
kit, TRD PTR11-12080 or Megan Racing MRS-TY-1710 rear sway bar."