JE Pistons BMW S14B23 3.7086in Bore 13:1 KIT Set of 4 Pistons

Forged from 2618 aluminum, these JE Pistons are built for the demanding S14B23 engine. This specific kit is designed for a 3.7086-inch bore and a 13:1 compression ratio, making it a solid choice for rebuilding or upgrading your BMW's performance engine. JE Pistons has over 75 years of experience in creating high-performance pistons, and this set reflects that expertise, being engineered, forged, and machined entirely in the USA.

The design incorporates JE's proprietary Forged Side Relief (FSR) forging, which helps reduce friction and power loss by using a narrower skirt and a shorter wrist pin, also saving weight. Depending on the specific application, these pistons may also feature an accumulator groove to manage combustion gas pressure, improving ring seal and maintaining consistent power. Some applications also include a skirt coating to further reduce friction and wear on the piston skirts and cylinder walls, which can also help quiet down engine noise. These features work together to provide optimized performance and durability for high-demand applications.

This kit includes everything you need to get your engine back together: four pistons, high-quality wrist pins, locks, and JE Pro Seal premium piston rings. They are designed specifically for the S14B23 engine, ensuring a precise fit and optimal performance. Please note that this part is not CARB approved and cannot be shipped to California.