Mahle OE plain ring set: a performance steel Napier second ring in plain configuration sized 3.801 in with 1.0 mm face specification and .136 in RW per the catalog description. This ring set serves as a direct replacement component for engine rebuilds, offering correct sizing and construction for applications calling for these precise dimensions.
Mahle Rings Performance Steel Napier 2nd Ring 3.801in x 1.0MM .136in RW Plain Ring Set