I found 160 MPH last week. This was from the GPS and I know that’s accurate. I had to slow down b/c I still have the snow tires on the car and they were having trouble keeping up with the car. I still had about 2300 RPM before redline and really believe 175-180 MPH is possible. Not that I will be in the middle of the desert anytime soon but with my summer rubber that drive could be more interesting. BTW I was between Denver and Vegas.