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The Mahle OE plasma-moly top ring is a replacement piston top ring made from Plasma Moly steel (HV385) sized for a 3.425 in bore with a 1.0 mm section width and .143 in RW specification. It serves as the compression/top ring in a piston ring set, supplied for individual cylinder service or engine rebuilds requiring that exact ring dimension.
Mahle Rings Performance Plasma Moly Steel HV385 Top Ring 3.425in x 1.0MM .143in RW Moly Ring Set
