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The Mahle OE plain piston ring set is a Performance Steel Napier THM-13 assembly sized 4.065 x .043in with .135RW, supplied as a plain ring set for engine servicing and rebuilds. It provides the listed ring dimensions and plain ring construction for direct replacement where this specification is required, offering consistent sizing for compatible pistons.
Mahle Rings Performance Steel Napier THM-13 4.065 x .043in .135RW Plain Ring Set
