JE Pistons Cosworth YB ASYM KIT Set of 4 Pistons

If you're building a high-performance Cosworth YB engine, getting the right pistons is crucial for durability and power. This set of four asymmetric pistons from JE Pistons is designed specifically for that engine, offering a solid foundation for serious builds. JE Pistons brings over 75 years of experience to the table, focusing on creating pistons that can handle the demands of racing and high-output applications.

These pistons are forged in the USA from 2618 aluminum, a material chosen for its high tensile strength, which is essential for engines pushed to their limits. They feature JE's proprietary Forged Side Relief (FSR) design, which helps minimize friction and power loss by reducing skirt width and using a shorter wrist pin, saving weight in the process. Depending on the specific application, you might also find an accumulator groove to help reduce combustion gas pressure, leading to better ring seal and consistent power, and a skirt coating to further reduce friction and wear while quieting operation. This kit includes high-quality wrist pins, locks, and JE's Pro Seal premium piston rings, ensuring you have the necessary components for a complete installation.

This set is designed for a 3.602-inch bore and includes pistons with an inverted dome/dish shape for an 8.00:1 compression ratio. It's important to note that 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.