This isnt a new car to the modification scene , Ive seen almost everything done to these cars and I think the amount of performance stuff they got is definately comparable to civics and other cars that have a long list of parts available forem. I find the cars factory setup to be sluggish all through the power band and not really anything to brag about however the early non restricted models had no limiter on top speed which IS something to brag about. With a performance chip itself and no top speed limiter the car has some impressive capabilities, do this before intake/exhaust work cus its a bigger bang for your buck and will give you an idea of a real performance change that you will really notice. If you go with k&n clean the mas coils regularily so you dont run lean/rich and lose hp instead of gaining it. Also k&n oil can burn out mas and make the check engine light come on. If you change your exhaust youll most likely go catback however new hiflow headers should be fitted with greater diameter pipe and removal of the cat and an exhaust system that will provide enough back pressure and freeflow as possible, most header kits will have a exhaust kit to fit directly or a new cat and cat back system that is proven to work best with the headers. Biggie to remember O2 SIMULATOR , if you do a cheap job and remove the cat all together on stock pipe or even encounter a thrown emissions code with the factory cats on with headers use a O2 Simulator desighned for your engine specifically and youll never throw codes again if you cant reflash the computer and the light stays on it will take time for it to reset itself and eventually the light goes away when the car gets enough positive signals and stays out unless you have some other engine problem like its sposed to.