MSD #2910 Throttle Body Fuel Injection, Atomic EFI, Self Tuning, Speed Density, 4-Barrel, Square Bore, Without Fuel Pump, Kit. M46-2910 Description:If your vehicle already has an electric fuel pump with a return line in place, you might not need to replace it.* If this situation fits your car, consider the Throttle Body Kit which comes with the throttle body, power module (with wide band O2 sensor), and handheld controller. *For an existing fuel system to work with the Atomic, MSD recommends the system be able to maintain 42psi constant and use 3/8 or dash 6 fuel line rated for EFI. The Atomic can support a return fuel line if needed for your application. Throttle Body:The crown jewel of the Atomic EFI system is of course the throttle body itself. The MSD engineers have countless hours in designing the unit with great performance and appearance. The compact design is similar in size to a carburetor, yet contains an electronic control unit, four injectors, the idle air control solenoid, TPS, MAP, intake air temperature (IAT) and more.Power Module:The power module is a remote mounted item for the Atomic that handles all the high current loads. MSD's CAN-Bus technology allows for a single, clean connection between this unit and the throttle body mounted ECU. * CAN-Bus - These two ports are for MSD's CAN-Bus technology. Just plug in the throttle body and the handheld controller and you are ready to go - nothing complicated! Best of all, these two ports are interchangeable, so don't worry about which plug goes where. * Wiring - Most of the wiring for the Atomic comes through this loom. This includes the fuel pump power (no relay required!), two fan controls, wide band 02 sensor, 12 volt...