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Mahle OE Napier Steel second‑ring plain set sized 4.125 in x 1.0 mm (.136 in RW) supplies a direct‑fit replacement ring for engines using that bore and ring specification. This plain second ring set is intended for engine rebuilds and repairs where matching ring OD and thickness are required, giving technicians the correct Napier Steel ring geometry for sealing and ring pack restoration.
Mahle Rings Performance Napier Steel 2nd Ring 4.125in x 1.0MM .136in RW Plain Ring Set
