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The Mahle OE plasma moly steel top compression ring set, 4.615 x 1.0 mm .143 RW, supplies a plasma-moly coated steel top ring sized for engines specifying that diameter and cross-section. The description identifies it as a performance top compression ring suitable for rebuilds and precision engine work. Use this set where the 4.615-inch diameter and 1.0 mm thickness match the engine's piston ring groove specifications.
Mahle Rings Performance Plasma Moly Steel Top Compression Ring 4.615 x 1.0MM .143 RW Moly Ring Set
