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The Mahle OE plain ring set for Napier THM-13 is sized 3.551 x 1.5 mm and supplied as a plain ring pack for piston rebuilds. These rings provide the fundamental sealing function for piston assemblies and come in a single specification for clear application reference. Bulk or service use is supported by the pack quantity and original-fit sizing included in the product description.
Mahle Rings Performance Napier THM-13 3.551 x 1.5MM Plain Ring Set
