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The JE Ultra Series forged piston set for GM Gen III/IV LS engines features a 4.010 in bore and 4.000 in stroke in an eight-cylinder kit suited to high-horsepower, boost-heavy builds. JE's Aligned Grain Flow forging improves tensile strength, while thermal barrier crown coating, skirt coating, lateral gas ports and optimized pin oiling reduce heat and friction. Includes premium wrist pins and is made entirely in the USA.
JE Pistons Ultra Series GM Gen III/IV LS 4.01in Bore/4in Stroke Set of 8 Pistons
