Mahle Rings Performance Steel Napier THM-13 4.015 x .043in .135RW Plain Ring Set

When you're rebuilding the top end of your engine, getting the piston rings seated just right is critical for sealing combustion pressure and controlling oil. This Mahle Performance Steel Napier ring set is designed for that job. The Napier hook on the second ring helps it to rotate and scrape oil more effectively, which can lead to less oil consumption and better cylinder wall lubrication.

These rings are made from steel, which offers good strength and durability. The top ring is 4.015 inches in diameter, with a thickness of .043 inches, and the second ring has a Napier hook design. This specific configuration is often chosen for its ability to maintain a good seal under various operating conditions. Mahle is a well-known name in engine components, and this set is built to meet their standards for performance and longevity.