Mahle Rings Performance Gas Nitrid Steel Oil Ring Assembly 4.0650in x 3.0MM .127inRW Plain Ring Set

When you're rebuilding the top end of your engine, getting the piston rings seated properly is crucial for sealing and performance. This Mahle OE oil ring assembly is designed for that critical job. It features nitrided steel construction, which is a well-built way to ensure these rings stand up to the demands of combustion and help maintain a good seal over time.

The nitriding process hardens the surface of the steel, making it more resistant to wear and heat. This particular assembly is sized for a 4.0650-inch bore with a 3.0mm oil ring width and a .127-inch ring groove width. Mahle is a well-known name in engine components, and this set is built to meet the needs of a performance gas engine rebuild.