Audi TT 8S MK3 2.0T just updates RES Valvtronic Catback, Road Test With exhaust valve open .. You can control the exhaust with "RES" APP via smart phones ..
You can open variable exhaust valves when you play, close it when in urban area. RES exhaust is very convenient to play .
RES Exhaust can improve around 4-10 P performance ..
Website: www.res-exhaust.com
Email: res_exhaust@126.com ; res_exhaust@163.com
Wechat/Whatsapp: 86-135-3662-8659

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