JE Pistons GM LS 4.080in Bore .015in LS3 Oversize 2.7cc Asymmetrical FSR Dome Pistons - Set of 8

If you're building a high-performance GM LS engine, especially one based on the LS3 platform, these JE Pistons are a solid choice. This set includes eight pistons, each with a 4.080-inch bore and a .015-inch oversize to accommodate specific engine builds. They feature a 2.7cc asymmetrical FSR dome, designed to work with your cylinder heads for optimized compression and performance.

JE Pistons has been making forged racing pistons for over 75 years, and these are forged and machined entirely in the USA from 2618 aluminum. This material offers the high tensile strength needed for demanding applications. The Forged Side Relief (FSR) design is a notable feature, minimizing friction and power loss by using a reduced skirt width and a shorter wrist pin, which also saves weight. Depending on the specific application, these pistons may also include an accumulator groove to reduce combustion gas pressure, improving ring seal and consistent power, and a skirt coating to reduce friction and wear while quieting operation.

This set is designed specifically for the LS engine and its intended use, aiming for a balance of performance and durability. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a successful build, always refer to the manufacturer's installation instructions for details on ring gap, bearing clearance, and assembly.