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The JE forged piston kit for BMW S50B30 contains six pistons with a 3.406-inch bore and a 12.50:1 compression profile, engineered and machined in the USA. JE’s Forged Side Relief forging minimizes friction and mass; accumulator grooves help control ring flutter and improve seal. Skirt coatings (when included) reduce wear and noise. The kit ships with high-quality wrist pins, locks and JE Pro Seal premium rings.
JE Pistons BMW S50B30 FSR KIT - Set of 6 Pistons
