The IPR Valve regulates the oil bypass circuit of the high pressure oil pump. It is an electromagnetic valve that opens and closes to allow high pressure oil into the injectors. This enables the PCM to control fuel delivery by increasing the speed in which the IPR valve operates thus, being a critical component in your vehicle system. Replacement For: 2004-2010 Ford E-350 6.0L V8 Diesel Turbocharged 2004-2010 Ford E-450 6.0L V8 Diesel Turbocharged 2003-2010 Ford Excursion 6.0L V8 Diesel Turbocharged 2003-2010 Ford F-250 Super Duty 6.0L V8 Diesel Turbocharged 2003-2010 Ford F-350 Super Duty 6.0L V8 Diesel Turbocharged 2003-2010 Ford F-450 Super Duty 6.0L V8 Diesel Turbocharged 2003-2010 Ford F-550 Super Duty 6.0L V8 Diesel Turbocharged Replaces Part Numbers: 5C3Z9C968CA, 5C3Z-9C968-CA, 1846057C1, CM-5126, CM5126 Quality Guarantee: 24-Month Warranty At ATRACYPART, we take pride in the quality of our products and in your satisfaction. If you have any problems, do not hesitate to contact us.