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Mahle file-fit piston rings sized for 4.020 in. bore with +0.005 in. oversize. This set uses 1/16 in., 1/16 in. and 3/16 in. ring profiles and is intended for builders who will file-fit rings to final cylinder dimensions. The compact description specifies the rings' intended clearances and stack; use proper ring fitting practices during installation to ensure correct seal and performance.
Mahle MS 4.020in+ .005in 1/16in 1/16in 3/16in File Fit Rings
