Powerjection III is the pioneer in direct-fit carburetor replacement EFI systems. The revolutionary design of the Powerjection III provides tuning for any level of performance enthusiast. The Adaptive Learning system designed by Professional Products uses real time data from a wide band oxygen sensor to self tune the system while driving. For those who want a greater deal of control, or have higher power engines, the Powerjection III is laptop tunable, providing a virtually unlimited capacity to tune the engine at all rpm ranges. All this with a minimum of wiring and underhood clutter. The 70029, in Polished finish, is the complete kit for returnless systems, featuring the FuelonDemand fuel pump control module, allowing the system to be returnless without running a return fuel line to the fuel tank. Kit Includes throttle body, integrated control unit, FuelonDemand module, EFI fuel pump and filter, plus oxygen sensor and mounting kit.