In business since 1968, Columbus Diesel Supply Company specializes in original equipment manufacturers (OEM) diesel parts and services. Other services available are turbochargers and turbo accessories; charge-air coolers and test kits; consumer and commercial electrical components; OEM fuel injection as well as performance and engine control. The company supplies all types of products for tractor and truck pulling. Based in Columbus, Ohio, Columbus Diesel Supply Company stocks turbochargers for prostock, superstock, farmstock, superfarm and reverse rotation. Also on offer are Billet John Deere type nozzles, modified John Deere nozzles, International Harvester, Ford, Allis Chalmers and Pencil nozzles in various sizes.