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The Mahle OE plain piston ring set (Napier THM-13) sized 4.010 x .043in with .135RW is supplied in a 48-piece bulk pack for workshop or production needs. These plain rings provide the essential sealing interface between piston and cylinder and are appropriate when multiple rings of this exact diameter and rail width are needed for engine rebuilds.
Mahle Rings Performance Steel Napier THM-13 4.010 x .043in .135RW Plain Ring Set (48 Qty Bulk Pack)
