Exclusive Stainless Steel exhaust system Armytrix for Audi A4 B8 3.0 TFSI Sedan/Avant (2009-2015) with Valvetronic technology used for changing the exhaust sound from silent mode to beast mode. Armytrix exhaust also adds a feature to connect it with your smartphone to show vital functions of engine on it's display or set the RPMs for opening exhaust valves in automatic mode.Full description
Armytrix Valvetronic technology
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