JE Pistons SUB STI EJ257 Block w/ EJ20 Head 100mm Bore CR 8.5 KIT Set of 4 Pistons

This JE Pistons kit gives you a complete set of four forged pistons, along with high-quality wrist pins, locks, and JE Pro Seal premium piston rings. These are built for the Subaru Impreza from 2002 to 2008, specifically designed to handle the demands of performance applications where durability and power are key.

JE Pistons uses a proprietary Forged Side Relief (FSR) forging design, which helps minimize friction and power loss by reducing skirt width. They're made from 2618 aluminum right here in the USA, giving them the strong tensile strength needed for high-stress engine builds. Depending on the specific application, these pistons may also feature an accumulator groove to help reduce combustion gas pressure, improving ring seal for consistent power, and a skirt coating to cut down on friction and noise while reducing wear on the skirts and cylinder walls.

This kit is designed specifically for your engine and intended use, aiming for optimized performance and durability. Keep in mind that this part is not CARB approved and cannot be shipped to California.