With going into law you definitely have to play it straight. Gotta keep cat and egr. Svt headers are usually pretty easy to find. They pop up on the bst forums pretty often. You can have a shop weld on a egr bung pretty cheaply.
Catback exhaust just get a trubendz 2.5". You can even have a resonator added in and still be under $400 for brand new. And it is been shown to flow/make power just as good as any other exhaust!
Hatch Nation #9
"2 by 2 Hands of Blue."