JE Pistons GM LS3 4.065in Bore Size STD 7.5cc Asymmetrical FSR Dome Pistons - Set of 8

If you're building a high-performance GM LS3 engine, getting the right pistons is crucial for durability and power. These JE Pistons are designed specifically for the LS3, featuring a 4.065-inch bore size and a 7.5cc asymmetrical dome. They're built to handle the demands of serious engine builds, whether for the track or spirited street driving.

JE Pistons uses a proprietary Forged Side Relief (FSR) design, which means they've worked to minimize friction and power loss. This is achieved through a reduced skirt width and a shorter wrist pin, which also helps save weight. The pistons are forged in the USA from 2618 aluminum, a material known for its high tensile strength, making these pistons well-suited for high-demand performance applications. Depending on the specific application, these pistons may also include an accumulator groove to help reduce combustion gas pressure, improving ring flutter and seal for consistent power. A skirt coating, also application-dependent, can further reduce friction and wear on the piston skirts and cylinder walls, while also helping to quiet down engine noise.

This set includes eight pistons, all made 100% in the USA. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a complete engine build, ensure you have all the necessary supporting components and refer to the manufacturer's installation instructions for proper fitment and assembly.