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The Mahle OE plain second ring set is a replacement piston ring matched to a 4.2550" bore with a 1/16" edge width and grey iron construction. Specified as a second (plain) ring, it provides a direct restoration component for engines needing that exact bore dimension. Use it when replacing worn rings to maintain correct ring sizing and service fitment for the specified bore.
Mahle Rings 4.2550 Bore Dia 1/16in Edge Width Grey Iron THG Second Ring Plain Ring Set
