borla is the deepest IMO and there is a company called trubendz that will make piping and put a borls muffler and resonator on it for cheaper. BTW you should post in the duratec forum, that is your engine i believe. but borla is still awesome for your car.
FocusSport makes an awesome exhaust. Get the stealth option, it sounds SSSOOO good! Mine is a quiet, low growl untill I wood it, then it starts to get loud. It never gets as loud as a honda (my favorite part about this exhaust) and is has a deep sport-tuned sound. And it fits perfect. Highly recomend thier exhaust, not much else, but they do make a damn fine exhaust.
I have a Borla, which sounds awesome. That would be my choice, but the FS exhaust is good too. I almost got one over my Borla. Just in case you were curious, here's what the borla sounds like on my car.
why does every1 blow so much money on the name brand exhaust? go to a muffler shop and get custom bent 2.5 cat back with a just a glass pack if you want it loud and add a resonator if you want it a little quieter. i suggest cherry bomb glass packs. it might run you $150 tops for everything. installed and payed for
i have the FS sport exhaust and it is super quiet u dont need the stealth if u want quiet. i have svt headers and no cat and u can have a normal conversation even when ur at 6k rpms. and has a deeper tone then any other ehaust i have seen on a focus.
I have a 2003 ZTS and I went to a custom shop and priced a system out and he even recommended that I went with a premade system because he would charge as much. After some research a settled on Magnaflow flexback system, and I am very happy that I did. Although I dont have any vids to show it. [8D]