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The Mahle OE moly top ring set is a plasma-steel piston top ring finished with an HVOF molybdenum coating for a 4.005 in bore, 1.0 mm thickness and .143 in ring width. Presented as a single set, it identifies the exact ring dimensions for piston rebuilds and replacements where a 4.005 in bore top ring with HVOF moly surface is specified.
Mahle Rings Performance Plasma Steel Top Ring 4.005in x 1.0MM .143in RW HVOF Moly Ring Set
