The parts you'll need are everything AFTER the main cat (a.k.a. cat-back). You'll keep your manifold, & everything should bolt up at the front. Now the back is slightly more challenging.
Get the SVT exhaust of your choice, and take it to a shop. They'll install it for under $100 most likely. All they have to do is add a hanger for the passenger side muffler, and MAYBE one under the middle of the car. No other welding if you get the exhaust in one piece.
The muffler comes with a heat shield on it, so there will be no issue with fuel/brake lines & such.
Honestly, I've never done one myself, but I've read a lot of posts about it.
Enjoy.
