Interstate Companies, Inc., provides a broad range of automotive products and services through its group of businesses. Its Interstate PowerSystems unit distributes engines, transmissions, heater systems, mobile refrigeration products, generators, and other products manufactured by Detroit Diesel, Deutz, Dresser Waukesha, Espar, Allison, Carrier, and others. Its AssemblySystems division offers parts, kits, and assemblies to bus and coach OEMs throughout North America. The BearingsSytems unit provides bearing, power transmission, and conveyor services. Founded in 1957, Interstate Companies has more than 15 locations throughout Iowa, Illinois, Minnesota, Montana, Nebraska, Wisconsin, Wyoming, and the Dakotas.