JE Pistons LS ASYM FT 4.000STRK Set of 8 Pistons

This is a set of 8 JE Pistons LS ASYM FT pistons, designed for high-performance LS engines. These pistons are forged in the USA from 2618 aluminum, a material chosen for its high tensile strength, which is crucial for engines that see demanding use. They feature a flat-top design with a 4.065-inch bore and are intended for a 4.000-inch stroke application, with a specified compression distance of 1.115 inches and a 0.927-inch wrist pin diameter.

JE Pistons has incorporated several design elements to enhance durability and performance. The proprietary Forged Side Relief (FSR) forging design helps reduce friction and power loss by using a narrower skirt and a shorter wrist pin, which also saves weight. Depending on the specific application, these pistons may also include an accumulator groove to help manage combustion gas pressure, reducing ring flutter and improving ring seal for more consistent power delivery. Additionally, a skirt coating, also application-dependent, is used to reduce friction and wear on the piston skirts and cylinder walls, which can also lead to quieter operation.

These pistons are engineered and machined entirely in the USA, reflecting JE Pistons' extensive experience in forged racing pistons. They are specifically designed for each engine and intended use to optimize both performance and durability, making them a solid choice for builders looking for proven performance from their LS engine build. Please note that this part is not CARB approved and cannot be shipped to California.