SPEC 164 Tooth Billet Steel Flywheel for 1965-1973 Mustangs with a 289, 302, 351W or 351C Engine and Manual Transmission.
SPEC billet flywheels are manufactured and developed for specific driving environments and recommended based on how each car reacts to changes in rotating mass. SPEC flywheels are NOT a one-fits-all lightweight flywheel, though they can be used for an array of driving habits and racing/high performance applications.
All SPEC flywheels carry SFI certification. Provides a consistent and friction enhancing surface for the clutch disc. Also aids in proper inertia, which is determined by the flywheel weight.
Manufactured from only the highest quality steel, they are the only flywheels on the market manufactured to a .001 machine tolerance, guaranteeing a flat seating surface for the clutch and smooth rotational qualities for perfect balance and extended engine life.
Tech Tip: If you have a 1965-1966 Mustang with an original 160 tooth flexplate/flywheel the 157 tooth can be used as a replacement as long as you have a 10.5 in bolt circle and are using the “small” bellhousing. The small bellhousing is typically aluminum, the larger 164 tooth is typically cast iron. The 164 tooth flexplate/flywheel can NOT be used as replacement for the 160.