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The Mahle OE plain ring set is a gas-nitrided steel piston ring kit sized 4.020 x .043 x .157 RW. Supplied as a plain ring set, it provides the necessary sealing surfaces for compression and oil control during engine rebuilds. The explicit 4.020-inch listing helps you pick the correct rings to match pistons of that diameter during replacement or assembly.
Mahle Rings Performance Gas Nitride Steel 4.020 x .043 .157 RW Plain Ring Set
