GM Turbo 400 TH400 Aluminum Tailhousing with Bushing these cams provide better throttle

these cams provide better throttle response and more top-end horsepower than equivalent cams from other manufacturers

carbon-to-coil rotor conductor

Embroidered Speedmaster logo

These Speedmaster Fuel Rails feature a larger internal diameter that dampens the pulses and provides increased fuel volume

These water pump pulleys are made from a 356 aluminum alloy that is heat-treated to T-6 specs

GM Turbo 400 TH400 Aluminum Tailhousing with Bushing these cams provide better throttleThese Speedmaster tailshaft housings are designed to fit the stock Turbo 400 transmissions. They are five times stronger and more ridged than stock because they are made from aircraft grade aluminum alloy. Featuring thicker walls and more gusseting than any other manufacturer.