JE Pistons Toyota 4U-GSE 86.25mm Bore +.25mm Oversize 9.5:1 CR -16.7cc Dome FSR Piston (Set of 4)

JE Pistons has been a leader in forged racing pistons for over 75 years, known for applying their experience to a wide range of engines. This set of four FSR pistons is specifically made for the Toyota 4U-GSE engine, featuring an 86.25mm bore which is 0.25mm oversize. They are designed to provide the ultimate combination of durability and performance for high-demand applications, whether on the track or the street.

These pistons are forged in the USA using 2618 aluminum, a material chosen for its high tensile strength, which is essential for performance engines. The unique Forged Side Relief (FSR) design helps minimize 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 include an accumulator groove to help reduce combustion gas pressure, improving ring seal and preventing flutter. A skirt coating, also application-dependent, further reduces friction and wear on the cylinder walls, contributing to quieter operation.

This set includes everything you need to get your engine rebuilt: the four pistons, high-quality wrist pins, locks, and JE Pro Seal premium piston rings. They are engineered specifically for the 4U-GSE engine and its intended use, optimizing both performance and durability. Please note that these pistons are not CARB approved and cannot be shipped to California.