JE Pistons Chevrolet LS Gen III/IV 4.005in Bore 1.300in CH -5.00 CC Piston Set

JE Pistons is well-known for making strong engine components, and their SRP Pro line continues that tradition. This piston set is built for Chevrolet LS Gen III and IV engines, designed for builds where reliability and performance go hand-in-hand, whether you're hitting the track or the drag strip. These pistons are forged from 4032 aluminum, a material chosen for its strength and its tendency to expand less with heat compared to other alloys. This means a more stable engine at operating temperature and a more consistent seal.

What sets these SRP Pro pistons apart is their proprietary Forged Side Relief (FSR) design. This isn't just about looks; it means a reduced skirt width which helps minimize friction and power loss. They also use a shorter wrist pin, further saving weight. You'll also find an accumulator groove, which helps manage combustion gas pressure, reducing ring flutter and improving the seal for consistent power delivery. Plus, a low-friction skirt coating is applied to reduce wear and noise, all while helping the engine perform at its best. Every part of this set, from the pistons to the included JE Pro Seal premium rings, wrist pins, and locks, is made 100% in the USA.

This set includes eight pistons, each with a flat top design and a 4.005-inch bore. They are designed for a 1.315-inch compression distance and come with a 0.927-inch wrist pin. Please note that these pistons are not CARB approved and cannot be shipped to California. They are designed for performance builds and are a solid option for anyone looking to rebuild or upgrade their LS engine.