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The JE Ultra Series forged piston set for GM Gen III/IV LS engines uses a 4.135 in bore and 3.622 in stroke in an eight-cylinder kit built for high-boost and nitrous applications. Ultra Series employs JE's Aligned Grain Flow forging for superior tensile strength and includes thermal barrier crown and skirt coatings, lateral gas ports, optimized pin oiling and Trend Performance wrist pins. Made in the USA.
JE Pistons Ultra Series GM Gen III/IV LS 4.135in Bore/3.622in Stroke Set of 8 Pistons
