Mahle Rings Gas Nitride Steel Performance Top Compression Ring 4.625 x .043 .170 RW Plain Ring Set

If you're rebuilding the top end of your engine, getting the right piston rings is crucial for sealing combustion pressure and controlling oil. These Mahle OE performance top compression rings are built for that job. They feature a gas nitride treatment on the steel construction, which helps them stand up to the heat and friction inside the cylinder.

The steel material offers good strength, and the nitride surface treatment adds a layer of hardness that resists wear. This combination helps ensure a solid seal between the piston and cylinder wall, which is key for getting the most power out of your engine and keeping oil where it belongs. The rings are designed to fit a 4.625 inch bore with a standard thickness.