GM Turbo 400 TH400 Output Shaft, Yoke, and Tail Housing Kit - 40 Spline They are heat-treated prior to

They are heat-treated prior to thread rolling and machining and are rated at a whopping 190

It is set up to accept a spread bore carb but comes with an adapter plate that permits the use of square bore carbs

You can also use them as a manifold cover when you store your engine

They include a strong bonding process

These Speedmaster tailshaft housings are designed five times stronger and more ridged than stock because they are made from aircraft grade aluminum alloy

GM Turbo 400 TH400 Output Shaft, Yoke, and Tail Housing Kit - 40 Spline They are heat-treated prior toThese 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.