The Mahle OE plain piston ring set (Napier THM-13) sized 4.045 x .043in with .135RW is offered here in a 48-piece bulk pack for engine shops or rebuild projects. These plain rings serve as fundamental sealing components in piston assemblies and are suitable when this size and rail width specification are required during piston replacement or routine overhauls.
Mahle Rings Performance Steel Napier THM-13 4.045 x .043in .135RW Plain Ring Set (48 Qty Bulk Pack)