GM TH400 Forged Center Support W/ Billet Oversized Intermediate Piston These Speedmaster air cleaners are

These Speedmaster air cleaners are CNC-machined from billet aluminum and anodized

the use of 6 pinion gears means the stress on gears is spread over a greater surface area

Bronze gears absorb the increased wear in special cams and magnetos and are easily replaced before costly damage to the camshaft gear occurs

Speedmaster alternator pulleys are manufactured from quality materials to ensure strength and durability

the increased diameter applies more clamping force on the second gear clutch pack

GM TH400 Forged Center Support W/ Billet Oversized Intermediate Piston These Speedmaster air cleaners areIf your TH400 transmission is being used in high power applications, you'll need to look at every area of the transmission to boost your performance. It is highly recommended for competition applications.