The FlexFuel+ module requires only a few connections for such a powerful device. This harness provides power, ground, and the CanBUS Hi and Lo wiring connections. We offer a few varieties of the harness for installation into different vehicles and platforms for ease of use. Universal - The universal variant ensures seamless integration of the FlexFuel+ Control Unit into your vehicle, unlocking its full potential. It includes the wiring for power and ground using a 3M S/LOK and bullet connector for 14-18awg wire as well as a ground loop terminal for a 10mm stud or bolt. Additionally it comes with the 2-Way DTM to connect to a variety of our CAN Bus harness adapters. N54 OG to FF+ - This variant is perfect for the MHD user who had our original Flex Fuel module and would like to upgrade to the CAN Bus version for integration to their car and Bluetooth all in one. This harness will connect directly to the FlexFuel+ connectors and then plug into your existing harness already installed from your Flex Fuel for MHD installation. Ford - The Ford variant is for a direct plug-n-play setup with www.tuneplusinc.com setups. Please contact them for specific details on your setup.