Mahle Rings Performance Steel Napier 2nd Ring 3.644in x 1.0MM .136in RW Plain Ring Set

If you're rebuilding an engine and need to replace the piston rings, Mahle OE offers a solid option. This set includes steel Napier 2nd rings, which are known for their good sealing performance and ability to handle moderate cylinder pressures. The Napier design features an angled back, which helps it to rotate slightly in the groove, reducing wear and maintaining a good seal against the cylinder wall.

These rings are made from steel, offering good durability and resistance to scuffing compared to cast iron. The specific dimensions are 3.644 inches in diameter and 1.0mm thick, with a 0.136-inch ring groove depth. This is a plain ring set, meaning it doesn't have any special coatings, making it a straightforward replacement for many applications. It's important to note that these rings are not CARB approved and cannot be shipped to California.