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Mahle OE plain ring set: a performance steel Napier second ring in plain configuration sized 3.771 in with 1.0 mm face specification and .136 in RW as listed. This ring set matches the catalog dimensions for rebuild or production use where these specific ring measurements are required, providing the plain second-ring geometry.
Mahle Rings Performance Steel Napier 2nd Ring 3.771in x 1.0MM .136in RW Plain Ring Set
