Keep the traditional look of a carburator but have the improvements of Holley EFI with an externally mounted ECU with our 4150. This is a stand alone system used with Terminator X and Terminator X Max (not included, throttle body only). Improve your vehicle with onboard diagnostics, full control of ignition timing, input and output, and a wideband O2 sensor with fuel map self learning capabilities (not included, throttle body only). With this system, you'll have better idle quality, improved reliability, and overall better driveability.