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The JE Ultra Series 8‑cylinder forged piston kit for GM Gen III/IV LS with a 4.125 in bore and 3.622 in stroke is intended for larger-bore LS builds needing durable pistons. JE's Aligned Grain Flow forging maximizes tensile strength for extreme cylinder pressures. Thermal barrier crown coating, skirt coating, lateral gas ports and optimized pin oiling reduce heat and wear, while heavy-duty Trend wrist pins improve longevity. Made in the USA.
JE Pistons Ultra Series GM Gen III/IV LS 4.125in Bore/3.622in Stroke Set of 8 Pistons
