Travelled 170 kms at 200 - 220kms/hr in my 2012 Grande Sport to get my 2014 Viper. Did the same speed coming home in the Viper. The Viper was a little stiffer, but held the road better I thought. Way less road noise in the Viper. The car handled great, motor was great. This a highway car meant to move - I'm putting the supercharger kit on when it's available in 2016. Drive this car like the beast it is - otherwise, sell it and buy a minivan!! If you want more info SRT, pls. let me know and we can continue.