Not sure if this is the thread where I posted I ran my roadster at 140 for 20 miles after crossing the Mackinac Bridge about 13 years ago and ran my SRT6 to 150+ (ran out of clear road, not power). Both vehicles are ECU limited so other than larger tires, I think they have to be flashed to eliminate the "governor". (Same issue with Audis.) Some guys claim upwards of 170 in modded SRT6s. My 2018 Maserati Ghibli is limited to 178 but there is no way I am going to find out if it is true.