Originally Posted by LiquidGXP

The real reason the GXP'* mph goes to 160 is the control on the DIC for English or Metric readouts on the mileage/kilometers, gallons/liters used ect.. If you notice the GXP'* speedometer does not have those small dots with your speed in KPH inside the lager numbers for MPH. If you hit the E/M button on the dash you'll see the Mph turn dark and the KPH will light up. The Speedometer will automatically now display your speed in KPH on the same set of numbers. My guess is that as long as it stays in MPH mode (I dont know how to control that hardware wise) it should display the same speed using the same encoding as non GXP Bonnevilles.