JE Pistons GM LS 4.185in Bore Asymmetrical Inverted Dome - Set of 8

Forged from 2618 aluminum, these JE Pistons are built for the demands of high-performance GM LS engines. With a 4.185-inch bore, they are designed to handle the increased cylinder pressures and temperatures that come with serious performance builds. JE Pistons has been a leader in forged racing pistons for over 75 years, and this set reflects that experience, offering a robust combination of durability and optimized performance for your engine.

This set features JE Pistons' proprietary Forged Side Relief (FSR) forging design. This means a reduced skirt width and a shorter wrist pin, which helps minimize friction and power loss while also saving weight. Depending on the specific application, these pistons may also include an accumulator groove to help manage combustion gas pressure, reducing ring flutter and ensuring a consistent, strong ring seal. Some applications also benefit from a skirt coating that further reduces friction and wear on the piston skirts and cylinder walls, contributing to quieter operation and longer life.

Every JE Piston is forged and machined 100% in the USA, ensuring strict quality control and supporting domestic manufacturing. They are specifically designed for each engine and use application, meaning you get optimized performance and durability tailored to your LS engine's needs. Please note that these pistons are not CARB approved and cannot be shipped to California. They are designed for high-demand performance applications where strength and reliability are paramount.