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The Mahle OE plain piston ring set is a Performance Steel Napier THM-13 bulk pack sized 4.055 x .043 with .135 RW, offered in a 48‑piece pack for workshop or inventory needs. It delivers the specified plain ring dimensions for use in engine rebuilds and routine replacements where this exact size and ring profile are required, supporting consistent cylinder servicing.
Mahle Rings Performance Steel Napier THM-13 4.055 x .043 .135 RW Plain Ring Set (48 Qty Bulk Pack)
