The Airdog II-4G A6SABF494 165 GPH Fuel System is a complete fuel pump replacement and upgrade for your 6.4 Powerstroke 2008-2010. This system hooks up to the factory suction and supply lines on the frame rail, and completely bypasses the factory fuel pump. The included Air/Vapor return are sent back to the tank through a return “Y” that splices into the factory engine return, for a clean and easy installation. This is a 165GPH (Gallon Per Hour) lift pump system perfect for moderately modified trucks. Give your truck the upgrade it needs with the Airdog II-4G A6SABF494 165 GPH Fuel System.