Wiseco BMW S14B23 2.3L 16V Turbo 94.00MM Bore +0.50 Oversized 8.0:1 CR Pistons

If you're rebuilding the engine for your 1988-1991 BMW M3, especially for a serious racing application, these Wiseco Professional Series pistons are built to handle extreme conditions. These are forged from 2618 aluminum, a material chosen for its improved tensile strength, making them well-suited for the demands of heavy to severe duty performance builds. The 94.00mm bore size is 0.050 inches (0.50mm) larger than stock, which is common when rebuilding an engine to refresh cylinder walls or achieve a specific displacement. They are designed with a compression ratio of 8.0:1, which is ideal for turbocharged setups where you need to manage cylinder pressures.

Wiseco machines these pistons in the USA, paying close attention to details like precision ring grooves, anti-detonation grooves, and features that improve ring seal. This helps ensure efficient combustion and durability under high stress. They also feature an ArmorGlide skirt coating, which is designed to reduce friction and resist seizure, contributing to quieter operation and longer piston life. The fully machined crown ensures accuracy and consistency, and the forced pin oiling design helps keep the wrist pin lubricated, a critical point in high-performance engines.

This set includes four pistons, the wrist pins, and a premium ring set, ready for installation. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.