I have an 07 STI with a Cobb TBE, but I've been wanting to experiment with a louder system. You list a few different ones that it will bolt up to, any idea if it will work with mine? Also, I've had it dyno tuned by Agile, will this muffler mess with my tune? Sorry for the questions, but I dont want to have it tuned again or waste both our time (and my money!!).