LS ASYM FT 4.100STRK

The JE Pistons piston is a forged aluminum component designed for LS Gen III/IV engines with a 4.075 in. bore and a 4.100 in. stroke, resulting in a 7.0L/428 displacement. This piston features a flat top design with two valve reliefs and a +5.00cc piston head volume. It is engineered for extreme applications and professional competition, requiring the high-tensile strength of forged 2618 aluminum construction.

The piston utilizes a proprietary Forged Side Relief (FSR) forging design to minimize friction and power loss by reducing skirt width. The wrist pin style is press-fit or floating, with a pin diameter of 0.927 in. This piston is sold individually and fits the left side exhaust valve orientation.