so i just received delivery a little over a month ago for a brand new 2016 s5 sepang blue red black nappa interior black optics plus. i have lowered in on h&r oe springs til i get accu air installed. purchased a deval carbon diffuser Xpelultimate wrapped the car and am looking at exhaust systems. i have been leaning toward the Amytrix but hear complaints about it loosing power when valves closed, i don't really plan on running it at high rpms with the valves closed at all. i do want a valvetronic sonic type of exhaust, but want to make sure this won't fuck up the engine. 2 cents anyone? please have experience with the system
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