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The Mahle OE plain piston ring set uses gas-nitrided steel and precise 4.125 x .043, .157 RW sizing to support piston sealing during engine rebuilds and replacements. These single plain ring sets match the listed dimensions for accurate fitment and are intended for routine overhaul work where exact ring size and construction are required for reliable combustion sealing.
Mahle Rings Performance Gas Nitride Steel 4.125 x .043 .157 RW Plain Ring Set
