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  1. #1
    1st Gear

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    Sep 2010
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    Exhaust butterfly valve mod

    Anyone done this mod? (disconnect vacuum pipes on exhaust and block off)

    Makes a slightly louder exhaust noise (like the car is in S mode all the time)

    Even when car is in S mode at low speeds and with little throttle the valve is not fully open.

    Would want to go to a miltek system but don't want the car to be too loud and drony as I do a lot of motorway mileage.
    Audi RS4 B7 Saloon in Mugello Blue

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  3. #2
    1st Gear

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    Offline
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    Sep 2010
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    242
    Did the mod when I got home from work. Car now sounds as if it is always in sport mode. A good thing as I don't really want to go down the miltek route as I think that will be too loud.

    Also noticed one valve was stuck shut so after about 20 minutes of tinkering and wd40 it freed off to the normally open position.
    Audi RS4 B7 Saloon in Mugello Blue

 

 

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