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The Mahle plain piston ring set for Napier THM-13 is sized 3.4252 in bore with 1.5 mm ring width. Offered as a single plain ring set, it suits engine rebuilds and repairs that follow the Napier THM-13 specification. Use it when replacing worn rings during piston service to restore proper cylinder sealing in engines built to the THM-13 dimensions.
Mahle Rings Performance Napier THM-13 3.4252 x 1.5MM Plain Ring Set
