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The Mahle OE plain piston ring set is a gas-nitrided steel plain ring package sized 4.155 in diameter with .043 in thickness and .157 RW. Offered as a standard plain ring set, it matches the performance gas-nitride steel spec in the source and is intended for piston replacement or rebuilds where these dimensions are required by the engine specification.
Mahle Rings Performance Gas Nitride Steel 4.155 x .043 .157 RW Plain Ring Set
