JE Pistons - Set of 4 Mitsubishi 4B11T 89.0mm Bore -10.9 Dome Asymmetrical FSR Pistons - Set of 4

This is a set of four JE Pistons, specifically designed for the Mitsubishi 4B11T engine. You'll receive the pistons themselves, along with high-quality wrist pins, locks, and JE Pro Seal premium piston rings, all ready for installation. These pistons feature an asymmetrical FSR (Forged Side Relief) forging design, which helps minimize friction and power loss by using a reduced skirt width and a shorter wrist pin, saving weight in the process. They are forged in the USA from 2618 aluminum, a material chosen for its high tensile strength, making them well-suited for high-demand performance applications.

JE Pistons has over 75 years of experience in creating forged racing pistons, and these are engineered specifically for the 4B11T engine. The -10.9 dome specification is designed to work with specific compression ratios, in this case, a 9.00:1 ratio for a 3.504-inch bore. Depending on the specific application, these pistons may also include an accumulator groove to help reduce combustion gas pressure, which can improve ring seal and maintain consistent power. Some applications also feature a skirt coating that reduces friction and wear on the piston skirts and cylinder walls, contributing to quieter operation and longer component life.

When you're building an engine for serious performance, whether it's for track days or drag racing, having pistons that can handle the stress is crucial. These JE Pistons are made 100% in the USA and are built to provide a strong combination of durability and performance. Please note that this part is not CARB approved and cannot be shipped to California.