JE Pistons Toyota 4U-GSE 86.25mm Bore +.25mm Oversize 13.5:1 CR 2.2cc Dome FSR Piston (Set of 4)

Forged from 2618 aluminum, these JE Pistons are built for serious performance in your Toyota 4U-GSE engine. This set is designed for an 86.25mm bore, which is 0.25mm larger than stock, helping to restore compression and power in engines that have been bored out. The 13.5:1 compression ratio is a notable bump over stock, meaning you'll need to ensure your engine management system and fuel can support it for optimal results.

JE Pistons uses their proprietary Forged Side Relief (FSR) design, which features reduced skirt width and a shorter wrist pin. This not only saves weight but also minimizes friction and power loss, contributing to better overall engine efficiency. An accumulator groove is included, depending on the specific application, to help manage combustion gas pressure, reduce ring flutter, and improve the seal for consistent power delivery. Many applications also feature a skirt coating that further reduces friction and wear on the cylinder walls, while also quieting down operation.

Every component in this kit is manufactured 100% in the USA, ensuring a high level of quality control. You'll receive a complete set of four pistons, along with high-quality wrist pins, locks, and JE's Pro Seal premium piston rings. These pistons are specifically designed for the 4U-GSE engine and its intended use, offering a solid combination of durability and performance for builds aiming for increased power output. Please note that these pistons are not CARB approved and cannot be shipped to California.