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The Mahle OE plain piston ring set is a Performance Steel Napier THM-13 bulk pack sized 4.075 x .043 with .135 RW, sold as a 48‑piece pack for workshop or resale use. It supplies consistent plain ring dimensions across the set for rebuilds and maintenance where this specified bore and ring thickness are required, enabling technicians to source correct replacements in quantity.
Mahle Rings Performance Steel Napier THM-13 4.075 x .043 .135 RW Plain Ring Set (48 Qty Bulk Pack)
