JE Pistons Toyota 4U-GSE 87.00mm Bore +1.00mm Oversize 12.5:1 CR -2.0cc Dome FSR Piston (Set of 4)

JE Pistons has been a leader in forged racing pistons for over 75 years, building a reputation for durability and performance in demanding applications. They've applied that experience to this set of FSR pistons specifically for the Toyota 4U-GSE engine. These aren't just off-the-shelf parts; they're engineered and forged in the USA using 2618 aluminum, a material chosen for its high tensile strength, which is crucial for engines pushed to their limits.

This set features an 87.00mm bore size, which is 1.00mm oversize from the stock dimension, and a 12.5:1 compression ratio with a -2.0cc dome. The unique Forged Side Relief (FSR) forging design is a key feature, minimizing 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 also include an accumulator groove to help reduce combustion gas pressure, improving ring seal and preventing flutter. A skirt coating can further reduce friction and wear on the cylinder walls, leading to quieter operation and longer life.

When you're rebuilding an engine for high-demand performance, you want parts you can trust. This kit includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings, so you have the essential components for a solid rebuild. Remember, these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.