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The Mahle OE plain ring set is a performance steel Napier THM-13 piston ring package sized 4.130 in with 1.5 mm thickness and .150 ring width. Offered as an individual plain ring set, it serves as a direct replacement for piston sealing and compression control in engine rebuilds that call for these specific dimensions.
Mahle Rings Performance Steel Napier THM-13 4.130in x 1.5MM .150RW Plain Ring Set
