JE Pistons Ring Set 3.681in Bore / 0.0394in Top / 0.0472in 2nd / 0.110in Oil

When you're rebuilding the top end of your engine, getting the piston rings seated properly is key to making good power and ensuring long-term reliability. This JE Pistons ring set is designed for a 3.681-inch bore and is built to seal combustion pressure effectively, which helps maximize horsepower. They're a file-fit set, meaning you'll need to gap them to your specific application, a common practice for performance builds where precise control over ring seal is important.

This particular set features a 0.0394-inch thick carbon steel nitride top ring, a 0.0472-inch ductile iron phosphate second ring, and a 0.1102-inch low-tension carbon steel nitride oil ring. The nitride coating on the top and oil rings offers improved durability and helps reduce friction, contributing to both power gains and a longer lifespan for the rings and cylinder walls. These are the same types of services and materials used by professional racing teams, so you know you're getting well-built components.