What they need to crack down on instead of modifications is the way people drive. I just drove 124 miles out of town to class. It took longer than normal even with construction because of truckers trying to pass each other which brings everyone down to 55-60 MPH on a road that holds a speed limit of 70 or dipsh*ts that cant comprehend a sign that says "SLOWER TRAFFIC KEEP RIGHT" I maybe spent a whole 20 miles of that drive at 70+ MPH. People who congest traffic need to be sited no people with no cats, a lift, or in my case failing an emissions test because my K&N tube didnt have the sticker with the CARB Compliance number