Dynojet's new Target Tune is an exciting new product that can add a new dimension to your Harley-Davidson® ECM. When paired with a Target Tune specific calibration flashed by a Power Vision (sold separately), your ECM will run closed loop fuel control based on wideband O2 sensors. The Power Vision delivered calibration changes the coding in the ECM to "understand" the wideband signal (from Target Tune) and allows the ECM to accurately achieve the target AFR. Allows the factory ECM to interpret and use wideband O2 sensor signals. Target fuel table from the calibration is achieved in real time. Retains O.E.M. closed loop and achieves adaptive fuel control strategy. Learns and uses VE table corrections as you ride. Does not interfere with dealer diagnostic / service tools. Includes O.E.M. style connectors to plug into factory O2 harness, either 2- or 4-pin versions.