If all you have done is CAI and dual exhaust, you will actually lose low end torque by taking out your cats. It will give it a better tone, but a small loss in power. As far as being legal, google up virginia emissions laws and check it out.
"I'm not driving too fast...just flying too low"
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
90 7up vert - new project-07 DSG Focus -DD