JE Pistons SUB STI EJ257 KIT Set of 4 Pistons

If you're rebuilding the engine in your Subaru STI with the EJ257 engine, you're likely looking to push its performance limits. Forged pistons are a critical component when you're aiming for more power and durability than stock. JE Pistons has been a leader in this area for over 75 years, and this set is built specifically for your engine's demands.

These pistons are forged in the USA from 2618 aluminum, a material chosen for its high tensile strength, which is essential for high-performance applications. They feature JE's proprietary Forged Side Relief (FSR) design, which helps minimize friction and weight by using a shorter wrist pin and reduced skirt width. Depending on the specific application, you might also find an accumulator groove to help reduce combustion gas pressure, improving ring seal and keeping power consistent. Some applications also include a skirt coating to further reduce friction and wear on the cylinder walls, which also helps quiet down the engine operation.

This kit includes everything you need to get your engine back together: four pistons, high-quality wrist pins, locks, and JE Pro Seal premium piston rings. They are designed for an optimized balance of performance and durability, making them a solid choice for serious engine builds. Please note that these pistons are not CARB approved and cannot be shipped to California.