audi s4 revs
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  1. Audi
    This Audi S4 B8 is probably one of the loudest Audi S4's we've ever heard! It is fitted with a custom Fi Exhaust which produces an epic sound, especially witht the valves open! This video includes the very loud Audi S4 B8 revving it up with valves closed and valves open! Enjoy!
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