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The Mahle file‑fit piston ring set is specified for a 4.250" +0.005 in. bore and includes top and second rings at 1/16 in. thickness with a 3/16 in. oil ring. Supplied for precision fitting, these rings require the installer to file to final end‑gap for exact cylinder match. The product description lists exact cross‑sections to guide selection and correct installation for reliable sealing and oil control in rebuilt engines.
Mahle MS 4.250in+ .005in 1/16in 1/16in 3/16in File Fit Rings
