Mahle Rings Perf Gas Nitride Steel 4.135in x .043in .157 RW Bulk Plain Ring Set (48 Qty Bulk Pack)

If you're rebuilding the top end of a performance gasoline engine, getting the piston rings right is crucial for sealing combustion pressure and managing oil. This bulk pack of Mahle OE piston rings is designed for engines with a 4.135-inch bore, offering a solid foundation for a reliable rebuild.

These rings are made from steel and feature a nitride treatment. Nitriding is a surface hardening process that makes the ring surface tougher and more resistant to wear, which is important for maintaining a good seal against the cylinder wall over time, especially in performance applications. The rings have a thickness of 0.043 inches for the top ring and 0.157 inches for the second ring, with a standard ring groove width. This set comes in a bulk pack of 48, making it suitable for engine builders working on multiple engines or those who need spares.

When rebuilding an engine, it's important to ensure all components are clean and properly installed according to the manufacturer's specifications. This set provides the essential sealing components for your engine's cylinders.