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The JE Ultra Series 8‑cylinder forged piston kit for GM Gen III/IV LS with a 4.010 in bore and 3.622 in stroke delivers a performance-focused replacement for tuned LS engines. Aligned Grain Flow forging increases tensile strength, supported by thermal barrier crown and skirt coatings to manage heat and reduce friction. Lateral gas ports and optimized pin oiling help sustain ring seal and lubrication; Trend Performance wrist pins add strength. Made in the USA.
JE Pistons Ultra Series GM Gen III/IV LS 4.01in Bore/3.622in Stroke Set of 8 Pistons
