GM TH400 Turbo 400 Transmission Billet Aluminum Direct Drum Only Speedmaster aluminum adapter spacers allow

Speedmaster aluminum adapter spacers allow you to adapt Powerglide to Turbo TH400 automatic transmission tailhousing

Valve CoversCover your valvetrain with a set of Speedmaster fabricated aluminum valve covers

while the extruded body has a tensile strength over 60

Slim line design for when space is at a premium

and are ideal for new projects or replacing missing or damaged mounting caps

GM TH400 Turbo 400 Transmission Billet Aluminum Direct Drum Only Speedmaster aluminum adapter spacers allowThis TH400 7075 T6 Billet Aluminum Direct Drum is manufactured specifically for drag racing. Includes a Billet aluminum piston. Drum weights 55% less than the OEM drum.