JE Pistons MINI COOPER S 8.3:1 Set of 4 Pistons

Forged in the USA from 2618 aluminum, these JE Pistons are built to handle the demands of a high-performance Mini Cooper S engine. With a 3.041-inch bore and an 8.3:1 compression ratio, this set of four pistons is designed to optimize performance and durability for your specific engine application. JE Pistons brings over 75 years of experience to the table, ensuring that each piston is engineered for victory lane, whether you're on the track or pushing your street car to its limits.

These pistons feature JE's proprietary Forged Side Relief (FSR) design, which uses a reduced skirt width and a shorter wrist pin to minimize friction and power loss while also saving weight. Depending on the specific application, they may also include an accumulator groove to help manage combustion gas pressure, improving ring seal and maintaining consistent power delivery. A skirt coating, also application-dependent, further reduces friction and wear on the piston skirts and cylinder walls, contributing to a quieter engine operation. This kit includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings, so you have the essential components for a solid rebuild.

This piston set is designed specifically for the Mini 1.6 SC Tritec engine. Please note that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.