Mahle Rings Performance Gas Nitride Steel 4.005 x .043 .157 RW Plain Ring Set

If you're rebuilding the top end of your engine, getting the right piston rings is crucial for proper sealing and performance. These Mahle OE rings are made from steel and treated with a nitride finish, which helps them stand up to wear and tear inside the cylinder. They're designed to fit a 4.005 inch bore with a standard ring thickness of .043 inches.

The nitride treatment on these rings is a notable detail. It hardens the surface, making them more resistant to scuffing and abrasion, which is important for maintaining a good seal between the piston and the cylinder wall over time. This helps ensure your engine runs efficiently and reliably after the rebuild.