GM TH400 Billet Aluminum 0.250" Oversize Intermediate Piston [5.867″] Available for center hung fuel

Available for center hung fuel bowls

Pontiac Firebird

Just bolt the pre-assembled unit to the back of the shifter and you are ready to go

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

with a pleasing finish that will complement any engine

GM TH400 Billet Aluminum 0.250" Oversize Intermediate Piston [5.867″] Available for center hung fuelAlmost 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.