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The Mahle OE plain second-ring set for a 4.040-inch bore includes grey iron RBT second rings with a 5/64-inch edge width, supplied as a plain ring set to restore proper ring profile and compression control during an engine rebuild. This OE-style replacement matches original geometry and is intended for accurate fitment to the specified bore when combined with the correct piston and installation practice.
Mahle Rings 4.040in Bore Dia 5/64 Edge Width Grey Iron RBT Second Ring Plain Ring Set
