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The JE Ultra Series forged piston set for GM Gen III/IV LS engines uses a 4.005 in bore and 4.000 in stroke in an eight-cylinder kit engineered for boosted V8 builds. It pairs JE's Aligned Grain Flow forging with thermal barrier crown and skirt coatings, lateral gas ports, optimized pin oiling and high-strength Trend wrist pins to maintain ring seal and durability under extreme cylinder pressures. Assembled in the USA.
JE Pistons Ultra Series GM Gen III/IV LS 4.005in Bore/4in Stroke Set of 8 Pistons
