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Mahle OE top compression ring plain set is a gas-nitrided steel performance ring sized 4.250 x .043 with .170 RW clearance, supplied as a plain ring set for use at the top compression position. These rings are specified for applications matching the listed dimensions and serve the core function of sealing the combustion chamber at the top ring location. Use as a direct replacement where those ring dimensions are required during engine rebuild or repair.
Mahle Rings Gas Nitride Steel Performance Top Compression Ring 4.250 x .043 .170 RW Plain Ring Set
