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The Mahle GNS severe-duty top ring for a 4.440 in bore is a 1.5 mm top ring supplied with +0.005 tolerance and intended as a file-fit component. Provided for top-ring replacement needs, it requires careful filing to achieve the correct final fit. Specify the 4.440" bore and the +0.005 tolerance when fitting to ensure restored combustion sealing and correct ring contact.
Mahle MS 4.440in 1.5mm GNS Severe Duty Top Ring
