Well and truely tested on those open French roads and Yes ! the speed limiter works on the SRT as well ! Angel says 152 MPH speedo says 155 MPH. Steady as a rock. This car brings French towns to a stand still, you have to park it where you can see it for the sheer fun of seeing all the guys walking round and round it trying to decide what it is, then taking photos on their phones, one with his girlfriend draped across the bonnet !! cheeky mare. All the Chrysler references have been removed and replaced with Crossfire, plus an nice AMG badge courtesy of China EBay. Any one fitted a Cheetah Radar detector, mine has really paid for itself.