JE Pistons SUBARU STI 2.5L KIT Set of 4 Pistons

JE Pistons is a well-known name when it comes to serious engine builds, and this set of four forged pistons is specifically made for the Subaru STI 2.5L engine. If you're rebuilding the top end of your STI, especially for performance applications, these pistons are built to handle the extra stress and heat that comes with increased power. They are forged and machined right here in the USA, using 2618 aluminum, which gives them the strong tensile strength needed for demanding engine work.

What sets these pistons apart is the attention to detail in their design. They feature JE's proprietary Forged Side Relief (FSR) forging design, which helps reduce friction and skirt wear, saving a bit of weight in the process. Depending on your specific application, you might also find an accumulator groove to help manage combustion gases, leading to better ring seal and consistent power delivery. Some applications also include a skirt coating to further cut down on friction and noise. This kit comes complete with high-quality wrist pins, locks, and JE's Pro Seal premium piston rings, so you have everything you need to get your engine back together.

These pistons are designed specifically for the EJ Series engine, with a 3.917-inch bore and an 8.50:1 compression ratio, featuring an inverted dome/dish design. Keep in mind that these are not CARB approved and cannot be shipped to California. For any high-performance Subaru build, these JE Pistons offer a solid foundation for durability and power.