- These pistons are specifically designed for Big Duke/Big Chief cylinder heads and feature JE's race proven dome and skirt design. Valve reliefs are designed to accept oversized valves and long duration, tight lobe separation roller cams. Precision CNC machined ring grooves accept .043 D-wall, 1/16, 3/16 rings. Pin #990-2930-18-51S (174g), double spiro locks #990-042-CS, and vertical and lateral gas ports are included.
Compression ratio with 87cc Heads 17.5:1
Compression ratio with 97cc Heads 15.6:1
SKU JE-243321 Manufacturer JE Vehicle Make Chevy BB Bore Size 4.600 Wrist Pin Size 0.990 Piston Material 2618 Forged Compression Height 1.120 Piston Ring Size .043 1/16 3/16 Piston Type Dome +20cc Rod Length 6.700 Crankshaft Stroke 4.750 List price No