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The Mahle OE plain ring set is a gas-nitrided steel piston ring kit sized 4.040 x .043 x .157 RW. Supplied as a plain ring set, it provides compression sealing and oil control surfaces needed during engine assembly or rebuilds. The explicit 4.040-inch dimension allows you to match rings accurately to pistons when replacing worn rings or completing a rebuild job.
Mahle Rings Performance Gas Nitride Steel 4.040 x .043 .157 RW Plain Ring Set
