JE Pistons Chevrolet LS Gen 3/4 3.898 in Bore - Set of 8

If you're rebuilding the heart of your Chevrolet LS Gen 3 or Gen 4 engine for serious performance, a strong set of pistons is where you start. These JE Pistons are built for demanding applications where durability and power are key. They're forged from 2618 aluminum, a material known for its high tensile strength, making these pistons well-suited for high-performance builds that push the limits.

JE Pistons has been in the game for over 75 years, and they machine these sets right here in the USA. They use a proprietary Forged Side Relief (FSR) design that helps cut down on friction and weight by reducing skirt width and using a shorter wrist pin. Depending on the specific application, you might also find an accumulator groove to help manage combustion gas pressure, which can improve ring seal and keep power consistent. Some applications also include a skirt coating to further reduce friction and wear, which can also quiet down the engine a bit.

This set is designed for a 3.898-inch bore and includes everything you need for an 8-cylinder engine. Keep in mind these pistons are not CARB approved and cannot be shipped to California. For a high-demand build, these JE Pistons offer a solid foundation.