First time 'poster', long time 'reader'.... well not really, but here goes! I have just recently bought a 2010 G6E Turbo (50th ann.) in white. Absolutely love the car, just looking for a more distinguished exhaust note. It goes like a rocketship but unfortunately does not sound like I want it to. The car was first registered mid 2011 so I still want to maintain the factory warranty, therefore I believe a cat back system will keep that in tact and still give me the note that I require (without a tune?). And heck- I can always add to the cat back at a later date. Trawling the internet for the last couple of days it seems like the Xforce twin 2.5" may be the way to go for the budget conscious (which I currently am). It seems to get a reasonable gig in most articles. Is this the case? Living in Melbourne I am shopping around for the best deal possible to install one of these systems. I was hoping someone on this site could point me in the right direction as I have no one in my contact list who can provide assistance in this matter. Thanks in advance!