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The Mahle OE plain piston ring set is a Performance Steel Napier THM-13 assembly sized 4.075 x .043 with .135 RW, supplied as a plain ring set intended for replacement during engine servicing. It provides the specific ring dimensions and construction noted in the listing, suitable for matching to pistons requiring these exact measurements during rebuilds or repairs.
Mahle Rings Performance Steel Napier THM-13 4.075 x .043 .135 RW Plain Ring Set
