JE Pistons MITSU 4G63 EVO KIT Set of 4 Pistons

JE Pistons has been a leader in forged racing pistons for over 75 years, and they've put that experience into this set of four pistons specifically for the Mitsubishi 4G63 engine found in the Evolution VII-IX models. These aren't just generic pistons; they're engineered and forged right here in the USA using 2618 aluminum, a material chosen for its high tensile strength, which is crucial for engines pushed to their limits. This means you're getting a well-built component designed to handle the demands of performance applications.

What sets these pistons apart is their specific design for the 4G63 engine. They feature JE's proprietary Forged Side Relief (FSR) forging design, which helps minimize friction and power loss by reducing skirt width and using a shorter wrist pin, saving weight in the process. Depending on the specific application, you might also find an accumulator groove, which helps manage combustion gas pressure to improve ring seal and maintain consistent power. Some applications also include a skirt coating to further reduce friction and wear on the piston skirts and cylinder walls, which can also lead to quieter operation. This kit includes everything you need to get started: high-quality wrist pins, locks, and JE's Pro Seal premium piston rings.

This piston set is designed for a 3.366-inch bore and uses a 22mm pin. It's important to note that these pistons are not CARB approved and cannot be shipped to California. If you're rebuilding your 4G63 engine for performance, this set is a solid option built with the materials and design expertise JE Pistons is known for.