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The Mahle OE plain piston ring set is a gas-nitrided steel plain ring package sized 4.140 in diameter with .043 in thickness and .157 RW. Supplied as a single plain ring set, it aligns with the performance gas-nitride steel specification shown in the source and serves as a direct replacement option when engines call for these dimensions.
Mahle Rings Performance Gas Nitride Steel 4.140 x .043 .157 RW Plain Ring Set
