GM TH400 Heavy Duty Racing Transmission Billet Aluminum Direct Drum please note that some modification

please note that some modification to your stock fuel line may be necessary to adapt to our fuel rail system

loosening the converter and helping spool the turbo quickly

capable of withstanding valve spring load

Speedmaster cylinder head fasteners are made from aircraft quality 8740 high tensile strength chromoly steel and cold-forged to ensure molecular integrity

These rockers are the best deal on the market for your high performance and racing application

GM TH400 Heavy Duty Racing Transmission Billet Aluminum Direct Drum please note that some modificationThis TH400 Billet Aluminum Direct Drum is manufactured specifically for drag racing but also makes a great replacement for the hard to find OEM parts. Drum weights 55% less than the OEM drum. Made from 7075 T6 Billet Aluminum, 36 element Pro Mod Sprag and new large steel outer race to allow the use of more clutches. Used in applications up to 3000 HP.