This service includes a tune chip with the latest factory firmware and fuel map selection by tune resistor and an internal tune resistor installed in your ECU.  The internal tune resistor ECU is for use in systems that do not have the wiring for an external tune resistor, and the user does not want to modify the harness.  The tune resistor is added internally to the ECU. Customer must select which tune is desired. This services includes, chip, installation, tune resistor installation, and testing on a Rover hotwire injected vehicle.