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stable air flow at any rpm
Speedmaster aluminum LS valve covers will give your Chevrolet LS series engines a totally new look
the amount of oil flow required to the valvetrain is greatly reduced
Speedmaster direct drums are designed to prevent slippage and are able to withstand strong shifts on high horsepower applications
GM TH400 Billet Aluminum 0.250" Oversize Intermediate Piston [5.867″] stable air flow at anyAlmost 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.
