I was just browsing the forums last night and I ran across one that discussed turning off the advanced trac system. I just wnat to thank you all whoever you are for that information. if you drive with it on everyday as the car is designed to do, you do not really get a feel for how much performance this car has even in stock form because the advance trac takes care of you. Well you turn it off and you feel just what this car can do. I hit the gas and felt this thing fishtailing behind me it was like I was driving the car for the first time. No it does not make it faster, it just makes you realize just how much power a basic 305HP car actually has.