GM TH400 Forward Clutch and Direct Clutch Assembly w/o Clutches - Racing Speedmaster LS-series cylinder heads are

Speedmaster LS-series cylinder heads are rapidly expanding

Speedmaster machined aluminum water pump pulley nose cones are constructed from top-quality 356 aluminum alloy that's heat-treated to T6 specifications

When roller rocker arms are installed

Get the additional clearance you need for your belt or gear drive timing system with Speedmaster water pump spacers

These Speedmaster automatic transmission filter extensions are designed to move the transmission filter into the oil in most aftermarket deep transmission pans

GM TH400 Forward Clutch and Direct Clutch Assembly w/o Clutches - Racing Speedmaster LS-series cylinder heads areThe 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.