well, i was driving through kansas with my brothers and we decided to see how fast the durango would go.. with a slight head wind and going slightly uphill i only got 105.... since i dont know where the speed govenor kicks in, and considering all of the above mentioned, and the fact that it is most definately NOT aerodynamic, plus myself and two other guys with luggage in the car, eh, not too shabby..... the motor is completely stock, its a 5.9, and it has the 3.55 gears with 31x10.50/15 tires..........