JE Pistons 07+ Mitsubishi EVO X 4B11 86.25 Bore 10.0:1 +1.1cc Dome (Set of 4)

Built from 2618 aluminum, these JE Pistons are forged in the USA to handle the demands of high-performance engines like the Mitsubishi 4B11T. The 86.25mm bore size and 10.0:1 compression ratio are specifically chosen to optimize power and durability for this engine, making them a solid choice for serious builds.

JE Pistons incorporates advanced designs like their Proprietary Forged Side Relief (FSR) forging. This design uses a reduced skirt width and a shorter wrist pin to cut down on friction and save weight, which can translate to improved engine response. Depending on the specific application, these pistons may also feature an accumulator groove to help reduce combustion gas pressure, leading to better ring seal and consistent power delivery. A skirt coating, also application-dependent, further reduces friction and wear on the piston skirts and cylinder walls, contributing to quieter operation and longer life.

This set includes everything you need to get your engine rebuilt: four forged pistons, high-quality wrist pins, locks, and JE Pro Seal premium piston rings. They are designed and manufactured 100% in the USA, ensuring you're getting a well-built component ready for demanding use.