GM TH400 Billet Aluminum 0.250" Oversize Intermediate Piston [5.867″] with a pleasing finish that

with a pleasing finish that will complement any engine

Get rid of those old fuel bowl floats and upgrade to one of these Speedmaster carburetor floats

Pontiac Firebird

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

Available for center hung fuel bowls

GM TH400 Billet Aluminum 0.250" Oversize Intermediate Piston [5.867″] with a pleasing finish thatAlmost 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.