JE Pistons Ring Sets 1/16-1/16-3mm RING

When you're rebuilding an engine, getting the piston rings right is crucial for sealing combustion pressure and maximizing horsepower. This JE Pistons ring set, part number J30008-4000-5, is designed for 8-cylinder applications and features a file-fit design, meaning you can precisely adjust the end gap to match your specific cylinder bore for optimal performance.

This set includes a 0.064-inch ductile iron plasma moly top ring, a 0.064-inch iron phosphate second ring, and a 0.1181-inch carbon steel chrome low-tension oil ring. These materials and designs are chosen to ensure a tight seal, which helps prevent blow-by and keeps combustion pressure where it belongs. The file-fit nature allows for a custom fit, a technique used by professional racing teams to achieve the best possible seal and reduce friction.

Because these are file-fit rings, they require careful installation and measurement to achieve the correct end gap for your engine's cylinders. This level of precision is what helps JE Pistons achieve gains in durability and power for performance builds.