My new ECU is set to US -- so this is not a KPH/MPH issue. My speedo is reading 100+ mph at very low speeds (10-20)... it quickly goes to all dashes. My odometer increased ~13 miles for a 3 mi ride. ugh! I'll have to take it back to the dealer --- but I'm just a little pissed off. This should have been caught on the test ride! Any advice? Maybe something quick I'm just missing? I should be enjoying my new exhaust - not sweating this, jeez.