I am really new to the sport compact scene. I have a lot of questions, but I will not ask them all at once. I cam rom the muscle car scene, I had a 2002 Camaro SS. I loved the car, but it had horrible gas mileage. I am wondering about cam gears. How much do they help, how hard are they to install, will they hurt the mileage, and I am sure that they void warranties. How about intake and exhaust. Can you feel a difference on these cars? I am thinking about getting and intake real soon. Any information I can get its great.