JE Pistons LS ASYM FT 4.000STRK Set of 8 Pistons

JE Pistons has been a leader in forged racing pistons for over 75 years, and they've put that experience into this ASYM FT piston set for LS engines. These pistons are engineered, forged, and machined entirely in the USA, using 2618 aluminum, which gives them the high tensile strength needed for high-demand performance applications. They are designed specifically for each engine and use case to offer the best combination of durability and performance, proven time and again in racing.

This set features JE Pistons' proprietary Forged Side Relief (FSR) forging design. This design helps minimize friction and power loss by using a reduced skirt width, and it saves additional weight with a shorter wrist pin. Depending on the specific application, these pistons may also include an accumulator groove to help reduce pressure from combustion gases, which can reduce ring fluttering and improve ring seal for more consistent power. Some applications also feature a skirt coating that reduces friction and wear on the piston skirts and cylinder walls, while also helping to lower operating noise.

This kit includes a set of 8 pistons, each with a flat top design, a 4.070 inch bore, a 1.115 inch compression distance, and a 0.927 inch pin. Please note that these pistons are not CARB approved and cannot be shipped to California.