F1 Racing Flywheel with Counter Weight Balance CW03-CC Meets or exceeds SFI 1.1 certification Made from 4140 forged chromoly steel (2X stronger than billet steel) Works with ACT StreetLite, ProLite, Fidanza, Clutchmasters and F1 Racing Flywheels Also included is a set (6 ea.) of Counterweight balance bolts