just added the Borla Cat-Back System Aggressive on my 07 GT. Sounds good, but was wondering about the X-pipe.

Borla offers one on their site also http://borla.com/applications/lookup...TX_Pipe/60092/

Would this be a good addition to what I have added already? Thanks for your help guys.

 

Definitely worth it. I don't know about Borla's X though. It's something I've been waiting to do, because I'd like to do X-pipe + LT's at the same time. If you're looking to go louder, definitely go with an offroad pipe. Go over to the exhaust forum and listen to a few combinations and see what you like.