Every so often I see this topic pop up and I was also in the same boat a few months ago. I acquired a 2014 bumper from a great member on here and a lower valance from another guy to do the swap. I decided to try something a bit different and modify my stock 2011 valance. I ordered a set of Magnaflow Competition axlebacks for the 11-12 GT (2.5" diam) because they come with a paper template to make the cutting of the valance easier. End result was pretty darn good! I'm still going to hold on to the bumper and valance for now just in case I change my mind lol. Anyway, just an option for fellow 10-12 owners.