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 : mhl40906.040 Description : Engine Piston Ring Set Piston Ring Material : Chrome Ductile Iron Piston Ring Type : Premium Piston Ring Size : 0.040IN 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 : Chrome Piston Ring Oversize : 0.040 in Bore Diameter (in) : 4.090 Top Ring Thickness (Axial Height) : 0.0935 in Top Ring Material : Ductile Iron 1970-1974 Ford F-100 Base V8.-cc Engine Components::Piston Rings 1970-1974 Ford F-100 Base V8.5899cc Engine Components::Piston Rings 1970-1974 Ford F-100 Base V8.6391cc Engine Components::Piston Rings 1970-1974 Ford F-250 Base V8.-cc Engine Components::Piston Rings 1970-1974 Ford F-250 Base V8.5899cc Engine Components::Piston Rings 1970-1974 Ford F-250 Base V8.6391cc Engine Components::Piston Rings 1970-1974 Ford F-350 Base V8.-cc Engine Components::Piston Rings 1970-1974 Ford F-350 Base V8.5899cc Engine Components::Piston Rings 1970-1974 Ford F-350 Base V8.6391cc Engine Components::Piston Rings 1973 Ford M-400 Base V8.-cc Engine Components::Piston Rings 1973 Ford M-400 Base V8.5899cc Engine Components::Piston Rings 1971 Ford M-400 Base V8.6391cc Engine Components::Piston Rings 1973 Ford M-400 Base V8.6391cc Engine Components::Piston Rings 1974 Ford M-450 Base V8.-cc Engine Components::Piston Rings 1973 Ford P-350 Base V8.-cc Engine Components::Piston Rings 1973 Ford P-350 Base V8.5899cc Engine Components::Piston Rings 1972-1973 Ford P-350 Base V8.6391cc Engine Components::Piston Rings