The Mahle OE oil ring assembly is a gas-nitrided steel oil ring sized at 4.0650 inches with a 3.0 mm cross section and .127-inch ring width. Intended for gasoline engine rebuilds and maintenance, this oil ring set provides the oil-control component for piston assemblies. The description highlights precise sizing and the nitrided steel construction present in the source text.
Mahle Rings Performance Gas Nitrid Steel Oil Ring Assembly 4.0650in x 3.0MM .127inRW Plain Ring Set