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The JE Ultra Series 8‑cylinder forged piston kit for GM Gen III/IV LS with a 4.005 in bore and 3.622 in stroke is engineered for high-output LS engines. JE's proprietary Aligned Grain Flow forging improves tensile strength for boosted conditions. Thermal barrier crown coating, skirt coating and lateral gas ports reduce crown temperatures and help preserve ring seal, while optimized pin oiling and Trend thick-wall wrist pins enhance reliability. Made in the USA.
JE Pistons Ultra Series GM Gen III/IV LS 4.005in Bore/3.622in Stroke Set of 8 Pistons
