Description
JE Pistons F.S.R. Tour Series GP Piston Forged 4.030" Bore 0.043 x 0.043 x 3.0 mm Ring Grooves Minus 5.0 cc Cylinder Head Bolt lock angle and 3 8" valve WEI7155 lock angle and 3 8" valve stem size are perfect replacement locks for stock engine rebuilds 1954 1966 Oldsmobile Starfire JE Pistons is the leader in high performance forged pistons piston designs and technologies