Includes OEM style connectors to plug into factory O? harness, either 2 or 4 pin versions Allows the factory ECM to interpret and use wideband O? sensor signals Retains OEM closed loop and achieves adaptive fuel control strategy Target fuel table from the calibration is achieved in real time Does not interfere with dealer diagnostic/service tools Learns and uses VE table corrections as you ride. PV TGT TUNE NO SEN 21+