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JE Pistons' forged kit for the BMW S14B23 four‑cylinder is produced in the USA and configured to the listed bore and compression ratio for specific rebuilds. JE's application-specific manufacturing includes proprietary forging and coatings to control friction and wear, and each kit ships with high-quality wrist pins, locks and premium piston rings designed for demanding performance use.
JE Pistons BMW S14B23 8.5:1 KIT Set of 4 Pistons
