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  1. Armytrix Audi TT/TTs Evolution Valvetronic Exhaust (vacuum actuated), exhaust sound videos!

    Audi
    The TT/TTs Evolution system lowers the back pressure and gives the Audi TT/TTs more power, It increases responsiveness and offers a deep sporty sound that grows to an aggressive roar when driven hard but still has no droning. Our valvetronic system is current leading the market with 3 modes...
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