Hello, i have an a5 2.0t and I am looking to get an AWE exhaust sytem for my car. I was wondering if the quad tip makes a difference in noise than from single side dual tips. The reason i ask is because if I get the quad tips, I would need to get a new rear valence which could get pretty pricey. So if any of you know if theres a difference in the two different options, please answer. Thank you. And also, what you think about powder coating my stock 2011 2.0t rims black on a ibis white a5?