APR Stage 2
 

I have a 2010 cc 2.0 sport. I recently did a stage 1 apr tune. I want to do a stage two and am confused about the difference between adding just a downpipe versus a turboback exhaust. UPS Motorsports works on my car and I remeber they said they make there own downpipes which would make my catback obsolete. Does anyone have any suggestions on going one way or the other. I want to get as much juice out of it as I can and would also like to make it a little throatier.

Thanks for any help...