It’s night and day between Valves On and Valves Off modes. Grab the control! Audi R8 V8 X Fi #EXHAUST #FiEXHAUST l #FiEXHAUST_USA #ExperienceThePassionOfEngineering Thanks to @VitalEnergyMotorsport ——————————————— #FrequencyIntelligent #ExhaustSystem
