i have borla stingers on my 03 gt and im loking for a deeper louder growl on it but i am wanting to keep my borlas on there so what should i do?

 

H-pipe. With or without cats. Without will get even louder. Make sure you check out some sound/video clips on the configurations to make sure you'll like it.

 

If you want to keep the Stingers, then look into catted or o/r pipes. A catted h will probably give you the deepest growl of all the options, and it will be noticeably louder as well. If you go o/r it will be louder for sure, but you will loose a little of that deepness.

 

I have LT headers and an off-road Hpipe with Flowmasters. The headers give it a very low tone, especially at idle. The system is not noisy while normal driving. Get on it, and it'll let the neighbors know you're there.

 

agreed..