I have found that people are more aware of me now. I am sure it is because I drive full size truck now, but it has to be at least in part due that I do not have mufflers . I have also noticed that I've slown down a good bit. I my impala I would average 15-30 mph over the speed limit, and the tickets showed it. In my truck I am averaging -5 to 15 mph under/over the speed limit. I like it when I race somone off the light now. They turn their heads, because the exhaust screams at them.