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

Starting with a 2618 aluminum forging, these JE Pistons are built for serious performance in your Mini Cooper S. They feature a proprietary Forged Side Relief (FSR) design, which means a narrower skirt and a shorter wrist pin. This not only cuts down on weight but also helps reduce friction and power loss, giving you a more efficient engine. The inverted dome or dish design is specific to your 1.6 SC Tritec engine, aiming for an optimized 8.3:1 compression ratio for performance applications.

JE Pistons has been in the forged piston game for over 75 years, and they machine these 100% in the USA. The 2618 aluminum offers the high tensile strength needed when you're pushing your engine hard. Depending on your specific application, you might also get an accumulator groove to help manage combustion gas pressure, reducing ring flutter and improving seal for consistent power. Some applications also include a skirt coating to further cut down on friction and wear, which can even quiet things down a bit. This kit comes complete with high-quality wrist pins, locks, and JE Pro Seal premium piston rings, so you have everything you need to get your engine rebuilt.

This set is designed for a 3.031-inch bore and includes the necessary components for a full engine rebuild. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a high-demand performance build, these pistons are a solid choice, bringing proven race-winning technology to your Mini.