EGR COOLERS available for heavy duty diesel engines including Cummins, Volvo, Detroit, Navistar, etc. Products have been tested and sold into the North American market for a long time, quality is reliable. Also, U-Man understands that the sooting and clogging issue existing in the OEM coolers need to be addressed to increase the life of the EGR coolers and has done the necessary modification to achieve equal performance while reducing the sooting problem.