Mahle OE plain ring set: a performance steel Napier second ring in plain configuration sized 3.791 in with 1.0 mm face specification and .136 in RW per the catalog description. Suited for rebuilds or applications needing these precise dimensions, the ring set provides the catalog-specified sizing and plain ring profile for correct fit.
Mahle Rings Performance Steel Napier 2nd Ring 3.791in x 1.0MM .136in RW Plain Ring Set