These Parts are NOT aftermarket. Please use our compatibility chart or verify with your part number to see if these parts are right for your car!! Maintains constant fuel pressure to the CP3 High-Pressure Injection Pump+. FCA – Fuel Control Actuator, FPR – Fuel Pressure Regulator, MPROP. THIS UNITS INSTALLS IN THE CP3 HI PRESSURE PUMP. These are also called MPROP’s. The symptoms of a faulty MPROP would be rail pressure that is too high or too low. The MPROP will often fail before the pump does, getting stuck and causing the symptoms mentioned above. > 2007, 2008, 2009, 2010, 2011, 2012 Dodge 6.7L Cummins. PLEASE NOTE: YOU WILL RECEIVE THIS PRODUCT EXACTLY AS SHOWN IN THE PICTURE!! Before installation, you must lubricate all seals and O-rings!! We highly recommend any auto part to be installed by a professional mechanic. We are not responsible for any damages caused by improper installation. After receiving the package.