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This Mahle plain ring set is a performance steel Napier THM-13 plain ring pack sized 4.170 inches with a 1.5 mm section and .150 RW specification, supplied for engine rebuilds. Presented as a precision replacement option, these rings match Napier THM-13 dimensions for applications requiring performance steel sealing rings.
Mahle Rings Performance Steel Napier THM-13 4.170in x 1.5MM .150RW Plain Ring Set
