AS Mustang LP 4.6 3V Classification Transmission Request
#29886 from David Mead · Rule change · TB 21-03 (2021-03 Fastrack)
In AS Spec Lines, Ford Mustang Coupe GT (05-14) Restricted Prep. (Aluminum Block, Aluminum Heads) 4.6L/5spd 3 valves per
cylinder 5.0L/6spd 4 valves per cylinder, change notes as follows:
"Max. Wheel Size: 18 X 10. Stock brakes or alternate Ford 14” Brembo Brake (Ford Racing Kit #M-2300-S) may be used. Either
engine and/or trans may be used as an assembly. Tremec Magnum transmission may be used as a replacement assembly for the
OEM transmission. P/N-TUET11010. Max compression ratio, 11.2:1
4.6L/5spd engine/trans:
Any commercially available cold air intake that bolts onto the engine is permitted. No modifications to the body, chassis, grill or
bumper are permitted when installing a cold air intake.Cold Air Intake, Ford Racing Part M-9603-M463 or K&N 69-3523KP cold
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air intake may be used. Replacement exhaust manifolds, or “headers,” as specified in the Full Prep American Sedan rules may be
used. Ford Performance camshaft kit P/N M-6550-3V may be used. Flywheel/clutch, as specified in the Full Prep American Sedan
rules may be used. The 4.6L/5spd engine assembly has a weight reduction of 300 lbs.
5.0L/6spd engine/trans:
56mm flat plate restrictor is required."