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Mahle OE HV385 top ring set, 3.563" diameter by 1.0mm (.143") with RW moly finish as specified. The description lists a plasma-moly treated steel HV385 top ring sized to 3.563 x 1.0mm for direct-fit replacement. It’s intended for engine rebuilds where that precise HV385 ring dimension and surface treatment are required.
Mahle Rings Performance Plasma Moly Steel HV385 Top Ring 3.563in x 1.0MM .143in RW Moly Ring Set
