Range Rover P38 / Landrover Discovery 2 Improved fuel map and high range mixture control Improved ignition timing to increase mid range torque. Capacity changes if required 4.6 4.8 5.0. Improved mid range and full throttle power. Large airflow meter upgrade for discovery 2. Rev limiter increased if required. Auto to manual conversion. We require the ecu to be sent to us for this.