This is the AirDog I FP-150-4G fuel system for the 2011-2014 Chevy/GMC Duramax 6.6L. This diesel lift pump mounts to the frame jig in front of the fuel tank for a clean looking installation. A 1/2" draw straw is used to pull fuel from the tank. The supply side is hooked up to the factory fuel line feeding the CP4 injection pump. The return is sent back to the tank through a filler neck tee. This is a 150GPH (Gallon Per Hour) lift pump system. Check out our installation manual for a list of parts that are included with this kit.