JE Pistons Chevy LS2 4.000in - 3.622in Stroke -14.3cc Dish Set of 8 Pistons

Starting with a 4.000-inch bore size, these JE Pistons are forged from 4032 aluminum. This material choice is key because it expands less when it gets hot compared to other aluminum alloys. For a high-performance engine build, especially one pushing the limits on the track or drag strip, this means a more stable and reliable engine that can handle the heat and stress.

These pistons feature JE Pistons' proprietary Forged Side Relief (FSR) design. This isn't just about making them look different; the FSR design reduces skirt width and uses a shorter wrist pin. The result is less friction and power loss, plus a lighter overall piston assembly. They also include an accumulator groove, which helps manage combustion gas pressure. This reduces ring flutter and ensures a consistent seal, which is critical for maintaining power output. A low-friction skirt coating is applied to further reduce wear, quiet down operation, and optimize performance.

This set is designed for Chevy LS Gen III/IV engines and includes everything you need to get started: eight pistons, premium JE Pro Seal piston rings, high-quality wrist pins, and locks. They are made 100% in the USA, ensuring solid construction and durability for your build. Please note that these pistons are not CARB approved and cannot be shipped to California.