Depends on your model of car. If you want to spend the money get a new header but if I am not mistaken the EX models have a type of header already on the engine. Also like honda530 said I would spend the cash on a good exhaust. I am running a Greddy Evo under my 5th gen and love it. I didn't change my headers because of what I stated above and the fact that I am getting an H22 but anyhow. Good luck.

Sean