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JE Pistons Cosworth N5B forged piston kit for 4‑cylinder applications (91mm bore, 8.00:1) delivers a race‑focused, application‑specific piston set made in the USA. The kit uses JE's Forged Side Relief forging for reduced friction, and may include accumulator grooves and skirt coatings to improve ring seal and wear characteristics. Each set ships with wrist pins, locks and JE Pro Seal piston rings.
JE Pistons COSWORTH N5B 91mm Bore 8:1 KIT Set of 4 Pistons
