Fuel Injection Pressure Regulator Dorman 904-578. See our other listings. Fuel Injection Pressure Regulator. This fuel pressure regulator is engineered to match the fit and function of the original equipment regulator on specified vehicles. This part is made of quality materials for durability and a long service life. See Item Specifics section for additional specifications about this part. To confirm that this part fits your vehicle, enter your vehicle’s Year, Make, Model, Trim and Engine in the Compatibility Table. Also review the notes section in the compatibility chart for additional specifications about this part. This part generally fits Blue Bird, Crane Carrier, Freightliner, International Harvester, Kenworth, Mack, Oshkosh Motor Truck Co. Peterb ilt, Pierce Mfg. The engine types ma y include 8.3L 8268CC 504Cu. L6 DIESEL OHV Turbocharged, 8.3L 8268CC 504Cu. L6 DIESEL Turbocharged, 8.9L 8849CC 540Cu. L 6 DIESEL OHV Turbocharged, 8.9L 8849CC 540Cu. L6 DIESEL SOHC Turbocharged, 8.9L 8849CC 540Cu. This p art fits vehicles made in the following years 2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018. Koskowski Automotive, LLC is a small family run business located in Fulton, NY. We have been in business since 1972. We offer new and used auto parts for all types of cars, trucks, vans and suv’s. Portions of the part information on this page have been provided by WHI Solutions, Inc.