MSI (Modern Silicone Technologies Inc.), a supplier of heavy-duty gaskets to OEMs and major aftermarket brands, is now serving the aftermarket directly with its Magnum brand. The growing product line includes 99 new Magnum heavy-duty gaskets and seals for Class 3 to Class 8 diesel truck engines. Coverage includes Dodge/Ram Cummins, Ford Powerstroke, GM Duramax, Navistar DT466, Caterpillar C7 thru C15, Detroit Diesel Series 60 and a range of Cummins engines.