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The JE Ultra Series forged piston set for GM Gen III/IV LS engines uses a 4.130 in bore and 4.000 in stroke in an eight-cylinder kit tailored for boosted or nitrous applications. JE's proprietary Aligned Grain Flow forging boosts tensile strength, while thermal barrier crown and skirt coatings, lateral gas ports and optimized pin oiling preserve combustion efficiency and reduce friction. Premium wrist pins and US production complete the kit.
JE Pistons Ultra Series GM Gen III/IV LS 4.13in Bore/4in Stroke Set of 8 Pistons
