This is our tried and tested tune for all E53 X5's. These tunes were designed on a Dynojet dyno and tested in the real world! All tune packages come with an OBD to USB cable and software to read and write your DME/ECU. A Windows computer is required to utilize the RK-Tunes flash software. Check FAQ section for windows device recommendation.
OPTIONS: ⦁ Fuel - Selectable fuel octane rating (91, 93) ⦁ Rear O2 Sensor Delete - If you are running aftermarket headers please select O2 Sensor delete. We will remove all coding associated with rear O2 sensors ⦁ SAP (Secondary Air Pump) Delete - If you have deleted your Secondary Air Pump, please select this option and we will remove the coding from the DME/ECU to avoid a CEL.
PERFORMANCE SPECS BASED ON MODIFICATIONS: 10-15+ WHP 8-14+ FT/LBS TQ
In the modification box, please specify all current vehicle modifications and desired options.