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The Mahle OE moly top ring set is a plasma-steel piston top ring finished with an HVOF molybdenum surface sized for a 3.922 in bore, 1.0 mm thickness and .143 in ring width. Sold as a single set, it lists the exact dimensions for piston rebuilds and replacements where a 3.922 in HVOF moly top ring meets the required specification.
Mahle Rings Performance Plasma Steel Top Ring 3.922in x 1.0MM .143in RW HVOF Moly Ring Set
