JE Pistons - Set of 4 Ford Sierra Cosworth N5B YB 90.82mm Bore Standard Size Pistons - Set of 4

If you're rebuilding the engine in your Ford Sierra Cosworth, especially for performance applications, you need pistons that can handle the stress. These JE Pistons are forged from 2618 aluminum, a material chosen for its high tensile strength, making them well-suited for high-demand performance builds where durability is key. They are designed specifically for the YB Cosworth engine, ensuring an optimized fit and function.

JE Pistons brings over 75 years of experience to the table, and these pistons are made 100% in the USA. They feature a proprietary Forged Side Relief (FSR) design that helps minimize friction and reduce weight by using a narrower and shorter skirt. Depending on the specific application, they may also include an accumulator groove to help control combustion gas pressure, improving ring seal and maintaining consistent power. Some applications also come with a skirt coating to further reduce friction and wear on the cylinder walls, which also helps quiet down operation.

This set includes four pistons, along with high-quality wrist pins, locks, and JE Pro Seal premium piston rings. Keep in mind these pistons are not CARB approved and cannot be shipped to California.