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This Mahle plain ring set is a 3.644 in. second ring specified at 1.0 mm thickness and .136 in. radial width, offered as a performance steel Napier second ring. Intended for rebuild or engine service where this size is required, the set provides the plain second‑ring profile specified in the description for matching piston and cylinder dimensions in compatible engines.
Mahle Rings Performance Steel Napier 2nd Ring 3.644in x 1.0MM .136in RW Plain Ring Set
