I would go with a X or H pipe with cats before I'd consider a cat-back system. I also have a 99 GT and have read that our exhaust isn't terribly restrictive as compared to earlier years. The X/H pipe will give you a nice exhaust sound and increase hp, 10-15hp? Steeda just came out with an X pipe with cats
and I see a lot guys going with the Bassani X. Expect to pay $400-500.
[This message has been edited by Ripper (edited 03-10-2000).]
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