I think most of the major brand race clutch companys(McLeod, Ram, Bonnafante(SP?)and so on) advertised theres as SFI approved spec #??? I had to buy NHRA aprroved scattershields, flywheels and clutches when I raced my stick shift stocker 30 yrs ago

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)