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The Mahle OE plain ring set is a Napier Steel second‑ring kit sized 4.065 in x 1.0 mm with a .136 in running width specified as a plain ring set. It provides a direct, no‑frills replacement ring profile intended to restore second‑ring sealing and control blow‑by in compatible engines. The description gives the core dimensions and ring role; check fitment against exact engine specifications before ordering to ensure proper application.
Mahle Rings Performance Napier Steel 2nd Ring 4.065in x 1.0MM .136in RW Plain Ring Set
