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Mahle plain top ring set for a 4.380 inch bore with 0.017 inch Dykes specification (PC479) provides matched piston rings intended for precision sealing during engine service. Supplied as a set for the specified bore, these plain rings are used to restore compression and proper ring fitment when rebuilding engines, offering a direct replacement sized to the listed bore and thickness for reliable reinstallations.
Mahle Rings 4.380in Bore Dia .017in Dykes PC479 Top Rings Plain Ring Set
