All harnesses included to work on J1850 4 pin, CAN 6 pin, the new red CAN 6 pin and interconnect to the dual channel wideband oxygen moduleThe PV3 tuner’s kit comes with everything you need to dial in an existing tune or build a custom tune from stockInstall the included wideband module, flash the ECU with the PV3 and then use C3 software to dial in your tuneMade in the USA