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Mahle file-fit top ring intended for severe-duty use, sized for a 4.500 in bore with a 1.5mm GNS top ring and supplied to +0.005 tolerance. Sold for rebuild and replacement work where a precise top ring is needed, this component is provided as a file-fit unit to be matched to cylinder bores during assembly to restore compression and proper ring sealing.
Mahle MS 4.500in 1.5mm GNS Severe Duty Top Ring
