JE Pistons LS ASYM DM 4000STRKR Set of 8 Pistons

If you're building a high-performance LS engine, especially one intended for racing or serious street use, a strong set of pistons is fundamental. This JE Pistons LS ASYM DM 4000STRKR set is built for those demanding applications. These aren't just off-the-shelf parts; JE Pistons draws on over 75 years of experience to craft pistons specifically for your engine and its intended use, aiming for the best balance of durability and performance.

Forged from 2618 aluminum right here in the USA, these pistons offer the high tensile strength needed to handle the stresses of a performance engine. They feature a proprietary Forged Side Relief (FSR) design, which uses a narrower skirt and a shorter wrist pin to cut down on friction and weight, contributing to better power output. Depending on the specific application, you might also find an accumulator groove to help reduce combustion gas pressure, improving ring seal and keeping power consistent. Some applications also include a skirt coating that works to reduce friction and wear on the piston skirts and cylinder walls, which can also lead to quieter operation.

This set includes eight pistons, each with a 4.065-inch bore, a 1.115-inch compression distance, and a 0.927-inch pin diameter. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a serious LS build, these pistons are a well-built choice.