Suggestions for Ford Mustang GT CA smog legal exhaust system?

I just purchased a 2005 Mustang GT, and I'm looking to improve the sound while still being California emissions legal. Don't know much about exhaust tuning… I love how some cars crackle and pop on liftoff. What can I do to get that? Upgrading performance and cost aren't a big deal to me, I just want it to sound better than stock and give it some more noise.

Don't know much. I just know white cars run better

You might be limited to axle back exhausts, Not all cat-back systems are legal in California. With that said if you want loud the Roush Extreme catback and the Flowmaster Outlaw catback will be the loudest. Keep in mind loud doesn't always mean "sounds good".