MAHLE Original piston rings are the most technically advanced piston rings in the industry. Driven by OE requirements; reducing friction and ring mass while minimizing engine oil consumption, and providing longer service life. MAHLE Original piston rings lead the industry for the latest piston ring technology. PartNumber : mhl41247 Description : Engine Piston Ring Set Piston Ring Material : Plasma-Moly Ductile Iron Piston Ring Type : Premium Piston Ring Size : Standard Top Ring Thickness (Axial Height) : 0.0935 in Top Ring Material : Ductile Iron Second Ring Material : Cast Iron Second Ring Thickness (Axial Height) : 0.078 in Oil Ring Assembly Thickness (Axial Height) : 0.1875 in Oil Ring Assembly Material : Stainless Steel Item Grade : Premium Piston Ring Face Coating : Plasma-Moly Piston Ring Oversize : Standard Bore Diameter (in) : 4.050 1980-1989 Ford B600 Base V8.-cc Engine Components::Piston Rings 1980-1989 Ford B700 Base V8.-cc Engine Components::Piston Rings 1980-1986 Ford C600 Base V8.-cc Engine Components::Piston Rings 1980-1986 Ford C700 Base V8.-cc Engine Components::Piston Rings 1980-1986 Ford C800 Base V8.-cc Engine Components::Piston Rings 1980-1991 Ford F600 Base V8.-cc Engine Components::Piston Rings 1980-1991 Ford F700 Base V8.-cc Engine Components::Piston Rings 1980-1991 Ford F800 Base V8.-cc Engine Components::Piston Rings 1980-1986 Ford FT800 Base V8.-cc Engine Components::Piston Rings 1988-1990 Ford FT800 Base V8.-cc Engine Components::Piston Rings 1980-1985 Ford L800 Base V8.-cc Engine Components::Piston Rings 1980-1985 Ford LN600 Base V8.-cc Engine Components::Piston Rings 1980-1985 Ford LN700 Base V8.-cc Engine Components::Piston Rings 1980-1985 Ford LN800 Base V8.-cc Engine Components::Piston Rings