See post #3.

 

You won't get any additional power from a catback on a stock engine, the stock flows well. Anyways on 5th gens, corsa is still the best with regards to drone (none) but when you get on it sounds great so corsa gets my vote

Sent from my Droid using Tapatalk

 

The drone on Corsa is just as bad as many of the others.

 

Ok so now I have a few questions, my car came used with the GMPP/Borla axle back. Can I:

#1 Adjust the sound as someone said before that Borlas can?

#2 Can I buy a x pipe and essentially make it a Borla cat back system?

 

i dont think borla offers anything like that, but check their web site.