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The Mahle OE moly top ring set is a plasma-steel piston top ring with an HVOF molybdenum surface sized for a 3.942 in bore, 1.0 mm thickness and .143 in ring width. Offered as a single set, it provides the exact top ring dimensions for piston rebuilds and replacements that specify a 3.942 in HVOF moly finished top ring.
Mahle Rings Performance Plasma Steel Top Ring 3.942in x 1.0MM .143in RW HVOF Moly Ring Set
