JE Pistons GM LS 4.075in Bore .010 LS3 Oversize -29.7cc Asymmetrical FSR Dish Pistons - Set of 8

If you're building a high-performance GM LS engine, especially one based on the LS3 platform, you'll want to consider these JE Pistons. This set includes eight pistons, each with a 4.075-inch bore and an oversize of 0.010 inches, designed to replace the stock pistons in your LS3. They feature a -29.7cc asymmetrical dish, which is crucial for setting your compression ratio correctly with your chosen cylinder heads and camshaft.

JE Pistons has been a leader in forged racing pistons for over 75 years, and these are forged and machined entirely in the USA from 2618 aluminum. This material choice is important because it offers the high tensile strength needed for demanding performance applications. The pistons incorporate JE's proprietary Forged Side Relief (FSR) design, which uses a reduced skirt width and a shorter wrist pin to minimize friction and save weight. Depending on the specific application, these pistons may also feature an accumulator groove to help reduce combustion gas pressure, improving ring seal and preventing flutter, and a skirt coating to further reduce friction, wear, and noise.

This is a comprehensive kit for rebuilding the bottom end of your LS engine. Remember that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.