Mahle Rings Performance Gas Nitrid Steel Oil Ring Assembly 4.0551in x 3.0MM .127inRW Plain Ring Set

These Mahle OE oil ring assemblies feature a nitrided steel construction, a tough surface treatment that helps them stand up to the demands of performance gas engines. The rings measure 4.0551 inches in bore size with a 3.0mm oil ring and a .127 inch rail width, designed for a precise fit in the piston groove.

When you're rebuilding an engine for improved performance, the oil control system is critical. These rings are made to Mahle's OE standards, meaning they are well-built and intended to provide reliable oil control under higher operating stresses. The nitriding process hardens the surface of the steel, which can improve wear resistance and help maintain a good seal over time, even in demanding conditions.