JE Pistons for big blocks engines are compatible with forced induction, nitrous and angle milled heads. Valve reliefs will accommodate oversized valves and long duration, tight lobe separation cams. Compression Height figured using 9.780? block height with zero deck clearance. Precision CNC machined ring grooves accept 1/16, 1/16, 3/16 rings. Will fit both open and closed chamber cylinder heads.

Includes:

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

Double spiro locks (#990-042-CS)

Compression Ratio:

110cc 9.5:1

118cc 9.0:1

124cc 8.6:1