GM TH400 Billet Aluminum 0.250" Oversize Intermediate Piston [5.867″] yet require less horsepower to

yet require less horsepower to turn

The Speedmaster Exhaust Gasket sets are designed for high-performance sealing and durability

Other features include availability in several colors

So can features such as full ball-bearing construction

the chance of failure is significantly reduced

GM TH400 Billet Aluminum 0.250" Oversize Intermediate Piston [5.867″] yet require less horsepower toAlmost 10% larger that stock intermediate piston, the increased diameter applies more clamping force on the second gear clutch pack. Reducing the possibility of driving through the clutches as the power curve comes on strong. The stock 5. 617 center support piston has be increased by 0. 250" to 5. 867 in diameter.