I replaced the Borla with the Corsa last Friday.
It's a little quieter, not a huge difference, but I can imagine it would not be loud enough with a completely stock x-pipe.
The Corsa with test pipes is perfect, IMO.
It sound similar to the Borla w/Test Pipes, a little more refined, and a little more tame in the higher RPMs.
Not a huge difference, still screams when you get on it, just smoothed it out and gave me more what I was looking for.
I love this car!!
