I own a 2002 GS300 Sport Design. I have added an SRT intake and computer, new speakers and amps, 18" Giovanni as well as some other minor modifications. I am really not happy with the cars performance and would like to get just a little more from it. I had an L Tuned exhaust, but had it removed as I felt like I was driving a honda civic. I am considering adding Xerd headers to the car and a Borla cat back. Do you think this will really wake the car up, or should I just start looking for a 430, as it doesn't seem practical to spend $7000 an a turbo or supercharger. Would also appreciate any suggestions you may have.