Mahle Rings Plasma Moly Carbon Steel Top Ring 3.937in Bore x 1.5MM Width .151in RW Moly Ring Set

This set includes Mahle OE Plasma Moly Carbon Steel Top Rings, designed for a 3.937-inch bore with a 1.5mm width and a .151-inch ring groove width. These rings are a key component for rebuilding or refreshing your engine's top end, ensuring a proper seal between the piston and cylinder wall.

Crafted from carbon steel with a plasma moly coating, these top rings offer improved durability and reduced friction compared to plain cast iron rings. The plasma moly surface is well-known for its ability to retain oil, which helps to further reduce wear and maintain a consistent seal under operating temperatures. This makes them a solid option for many engine rebuilds where reliable performance and longevity are important.