GM Turbo 400 TH400 Aluminum Tailhousing Without Bushing These Speedmaster fuel pumps feature

These Speedmaster fuel pumps feature an improved design for street and strip applications

This is a preloaded unit allowing for a faster-reacting unit

Kits include hardened flat washers for uniform torque and to prevent galling on aluminum intake manifolds

while delivering increased engine vacuum

They provide higher power and torque transmission

GM Turbo 400 TH400 Aluminum Tailhousing Without Bushing These Speedmaster fuel pumps featureThese 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.