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Speedmaster aluminum pulleys are made from a 356 aluminum alloy that is heat-treated to T-6 specs
as well as aftermarket control arms
and a direct clutch hub
Couple this Hi-Ram intake with the high flowing LS1 style cylinder heads has outstanding potential for naturally aspirated and forced induction applications
Speedmaster Aluminum Water Pump Pulley
GM Turbo 400 TH400 Aluminum Tailhousing with Bushing Speedmaster aluminum pulleys are madeThese 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.
