JE Pistons SUB WRX EJ205 92.50 mm Bore - 1.287 in. CH, -11.70 CC KIT Set of 4 Pistons

Forged from 2618 aluminum, these JE Pistons are built for high-demand performance applications. They are designed specifically for the Subaru WRX EJ205 engine, featuring a 92.50 mm bore and an inverted dome/dish design that results in an 8.50:1 compression ratio. This specific design choice is crucial for engines that have been modified for forced induction, helping to manage combustion pressures and prevent detonation.

JE Pistons brings over 75 years of experience to their forged piston sets, with this particular kit engineered and machined 100% in the USA. The proprietary Forged Side Relief (FSR) forging design is a notable feature, minimizing friction and power loss through a reduced skirt width and a shorter wrist pin, which also saves weight. Depending on the specific application, these pistons may also include an accumulator groove to help reduce combustion gas pressure, improving ring seal and maintaining consistent power. Additionally, a skirt coating, if included for this application, further reduces friction and wear on the piston skirts and cylinder walls, contributing to quieter operation.

This set includes four pistons, along with high-quality wrist pins, locks, and JE Pro Seal premium piston rings, making it a comprehensive kit for rebuilding or upgrading your EJ205 engine. Please note that this part is not CARB approved and cannot be shipped to California.