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 : mhl42136CP.040 Description : Engine Piston Ring Set Piston Ring Size : 0.040IN 1999-2001 Mazda Protege DX L4.1589cc Engine Components::Piston Rings 1999-2001 Mazda Protege LX L4.1589cc Engine Components::Piston Rings