I don't see the value in it. If we were talking the Corsa setup then I might agree. Like I said I am all about aftermarket setups if I see the benefit, all my summer cars have full setups from the headers back, Corsa on the Vette, Magnaflow on the Roush, but the GM perf exhaust I do not see the setup matching the price tag. The muffler is basically the XR, which imo is not loud enough. It just doesn't make enough sound for me. Your basically paying the GM tax for the setup. I put a custom mandrel bent setup on mine instead.
Your also taking the catback and combining it with the CAI for the numbers, which I'm not denying they are there, but not many are buying both. I also think the GM CAI is overpriced as well, plenty of other choices out there that cost less and look better, and put up good numbers. I'm not after numbers, if that was what I was looking for I'd be looking into heavy engine mods. If I want to go fast, I pull out my car (when its not winter lol)