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The Mahle OE plain ring set is a gas-nitrided steel piston ring kit sized 4.030 x .043 x .157 RW. Supplied as a plain ring set, it provides the compression and oil control sealing surfaces required during engine assembly and rebuilds. The explicit 4.030-inch dimension in the listing helps you select rings that match pistons of that diameter for accurate fitment.
Mahle Rings Performance Gas Nitride Steel 4.030 x .043 .157 RW Plain Ring Set
