GM TH400 Forward Clutch and Direct Clutch Assembly w/o Clutches - Racing which allow you to modify

which allow you to modify your cam timing

making them a great choice for your disc brake conversion

Speedmaster LS-series cylinder heads are rapidly expanding

Put together your own custom exhaust system with these Speedmaster collector reducers

Every Speedmaster flexplate will withstand the extreme power and rpm of your performance application

GM TH400 Forward Clutch and Direct Clutch Assembly w/o Clutches - Racing which allow you to modifyThe Speedmaster forward drum and direct drum assembly are designed to withstand high horsepower with their upgraded 36 element sprag design. Speedmaster GM automatic transmission parts are manufactured using the highest quality materials for strength and durability.