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Mahle OE plasma-moly top compression ring set specified at 4.040" diameter with .0625" thickness and .190" RW dimension. The description identifies a steel top compression ring treated with plasma moly, intended for rebuilds or performance rebuilds requiring OE-form fit and wear resistance. This set targets engines that call for the exact 4.040 x .0625 specification as listed.
Mahle Rings Performance Plasma Moly Steel Top Compression Ring 4.040 x .0625 .190 RW Moly Ring Set
