JE pistons are compatible with OEM and aftermarket standard valve location heads, JE pistons will accommodate oversized valves and long duration, wide lobe separation cams. Precision CNC machined ring grooves accept 1/16, 1/16, 3/16 rings and compression height is figured for 10.300 block height. Note: SVO A, C, E and BOSS aluminum heads require custom pistons.

Includes:

Pin #990-2930-18-51S (174g)

Double spiro locks (#990-042-CS)

Compression Ratio:

74cc 13.4:1

80cc 12.5:1

94cc 11.0:1