I have a Borla adjustable on my car currently. Also have 3" all the way back to a high flow Magnaflow catalytic converter and Clear Image Automotive headers. Sounds great with a full block off plate in the adjustable section.
It didn't sound perfect when I was tinkering with the exhaust though. I had different pipe sizes on the way back with the stock cat, and log manifolds etc. I had major rasp at higher RPMs.
If you're just buying the cat back exhaust and don't plan on doing all the way up to the motor, then I've heard Magnaflow is the best way to go.
Flowmaster sounds great from what I've heard, but doesn't flow well...(ironically)
Last edited by Namrepus28; 10-23-2009 at 02:27 PM.