Interstate Diesel began operations in 1947 rebuilding Detroit Diesel injectors. During the 1950’s the company started manufacturing fuel injection components. Working with OEM’s .During the 1970’s, McBee Supply was formed to service the aftermarket with replacement parts for Cummins Engines. As McBee Supply grew, so did its coverage of replacement parts for Caterpillar, Navistar, Detroit Diesel, and Komatsu engines. Since the early 90’s, Interstate Diesel has designed and patented a number of new fuel injection components including the industry leading “ECOTIP“ technology. This has been proven to save fuel and reduce smoke on EMD engines