002 wrote Just cut out your mufflers / cats and replace them with pipe. i would do it myself, it's not that hard to do. If you just want it loud, run open headers.

Basically ^^^^^

You CANNOT just take it to an exhaust shop unless your area doens't have restrictions on the emmissions. Easiest way to "straight" pipe is remove all exhaust run headers and leave on cat. Gut the cat and boom straight all the way back. My Lancer is that way. Stupid loud.