Description
MA3H –
Cummins 3023066 is an O-ring seal used in heavy-duty Cummins applications. Aftermarket parts catalogs place it in KT19 / KTA19 aftercooler assemblies, and Cummins parts documentation also shows it in KTA50 upper gasket sets and turbocharger-related assemblies.
Verified aftermarket versions include Interstate-McBee M-3023066, Dynamax DM-3023066, and IPD 3023066. Interstate-McBee specifically lists M-3023066 as a Cummins replacement O-ring seal.


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