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The Mahle OE moly ring set is a ductile plasma-moly top ring configuration sold as a matched set for a 4.285 in bore with a 5/64 in edge width. These precision rings are intended for piston sealing and wear resistance in rebuilt or serviced engines, offering a factory-oriented replacement option that preserves bore specification and top-ring moly protection without adding unsupported material claims.
Mahle Rings 4.285in Bore Dia 5/64in Edge Width Ductile Plasma Moly Top Ring Moly Ring Set
