#38766 Consolidate and update suspension rules

34. Suspension: B-Spec competitors may use the OEM suspension, the specific suspension kit approved on the spec line or any
B14 Bilstein shock or strut with no modifications except as required for mounting or to achieve allowed camber. Any part
required to adapt the B14’s to the car must be submitted for approval by the CRB and added to the individual spec line. For B-
Spec the maximum spring rate is 500# front and rear. C-Spec competitors may use the OEM Suspension, or the specific
suspension kit approved on the spec line. For C-Spec the maximum spring rate is 600 pounds front and 800 pounds rear Any
camber plate may be used, but may not alter caster. Caster shall be within factory specification. Helper springs made of thin flat
wire that are designed to take up the gap between the main spring and shock/strut at full travel are allowed. Tender springs are
not allowed. Springs are allowed to be strapped or zip tied to the body. The purpose of the strap should be to keep the spring in
place when the axle goes into rebound. The strap can serve no other function. Bump stops may be deleted but cannot be
modified or substituted and shall serve no other purpose. Adjustable sway bar end links may be used on all cars. Sway bars may
be disconnected and removed. If a manufacture does not offer an upgrade, a competitor may submit a shock and spring package
for approval by the CRB. At the time of approval, that kit will become the standard for that make and model until the
manufacture submits a factory supported kit. The competitor supplied kits needs to be comprised of the following: • Any non-
adjustable shock absorber intended for the specific make model and year car is allowed. The shock absorber must be installed in
the original mounting locations. Remote shocks are not permitted. Threaded shock bodies or adjusters may be used. • Any
spring up to a maximum spring rate of 500 pounds may be used with the OEM suspension, the manufacturer’s upgraded
suspension kit, or the Bilstein B14 suspension kit.
36. B-Spec and C-Spec front and rear toe settings are free. Rear toe adjustments may be achieved by the use of shims.
33. Competitors may use the OEM suspension, the approved suspension kit on a vehicle’s spec line, or any B14 Bilstein
shock/strut with no modifications except as required for mounting or to achieve allowed camber. The required parts to install a
B14 kit must be submitted for approval and added to a vehicle’s spec line.
B-Spec maximum spring rates are 500 pounds front and rear. C-Spec maximum spring rates are 600 pounds front and 800 pounds
rear. Helper springs made of thin flat wire that maintain spring position under full travel are permitted. Tender springs are not
permitted. Springs may be fastened to the body to keep the spring seated under full travel.
A maximum of 3.5 degrees negative camber is allowed on front and rear suspensions. Strut suspensions may adjust camber using
any camber plate, but it must not alter caster. Caster shall be within factory specifications.
Strut suspensions may adjust camber using slotted upper strut plates, eccentric bolts (crash bolts), and/or slotted strut mounting
holes at the spindle. Multilink suspensions may adjust camber using approved parts listed on a vehicle’s spec line.
If upper strut slotted plates are used, they shall be located on existing chassis structure and may not serve as reinforcement for
that structure. Modifications to the top of the strut tower may be made for camber adjustment only. Modifications to the
existing holes must only move the strut top inboard even if the existing slots would translate the top of the strut rearward.
Front and rear toe settings are free. Rear toe adjustments on beam axle cars may be achieved using shims.
Bump stops may be deleted but cannot be modified or substituted and shall serve no other purpose.
Adjustable sway bar end links may be used on all cars. Sway bars may be disconnected and removed."