Genuine new AirWerks/BorgWarner Turbo. 171702BW Enhanced Performance for your truck or bus's engine with this Borg Warner turbocharger. It is made specifically for the 12.7-liter Detroit Diesel engine that is very popular among many commercial vehicles up to 15L. These commercial vehicles often suffer from sluggish performance upon acceleration, and this turbocharger is designed to solve this problem. Fuel economy is important for such trucks and buses. A turbocharger is one of the only ways to improve performance without hurting fuel economy. We make no reccomendations as to what it can or cannot be used on please refer to manufacturer information. Incorrect application usage could damage some compoenents. As always an experienced tech should install and determine the cause of origianl failure of the turbo it is replacing.