whatever floats your boat I personally rather have an exhaust built by a company trusted in the s2k field where I know its going to be top notch quality and fitment.

 

If you go custom, the problem may be finding someone who can do quality work with stainless piping. Mild steel is heavy and high maintenance.

 

if ur in a low budget then custom is not bad.

As for getting the more power that you want, give or take it will most likely be if you want more power most likely you will get a higher dB level. (otherwise louder) Not all the time though.

If your a baller..
Spoon, Js Racing, ...

on a budget but still good powe gains
Greddy Ti-c, Tanabe,...

i bet you know the rest.

GL

 

im a budget somewhat. and i know a guy who does great work, probly as good if not better than the builds of most systems... and i know it will be a little louder...