Hellums admitted a long time ago he didn't hit it. If I remember right his taller tires would have added to the speed as well. I am sure the car is capable of 170+ modded, but I haven't had the straightaway to try it safely... It is on my agenda to find a place to try to top it out, but haven't located that place yet...maybe my trip out through Illinios will find me a lonely stretch of straightaway...lol