GM Turbo 400 TH400 Aluminum Tailhousing Without Bushing Speedmaster piston rings feature: Plasma-moly

Speedmaster piston rings feature: Plasma-moly coated

and designed with a 10 degree taper

Speedmaster extruded aluminum and stainless steel shaft mount rocker system includes steel shafts with pedestals

Almost 10% larger that stock intermediate piston

Uses OEM support bushings

GM Turbo 400 TH400 Aluminum Tailhousing Without Bushing Speedmaster piston rings feature: Plasma-molyThese 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.