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Exhaust butterfly valve mod

Discussion in 'RS4 Forum (B5 and B7 Chassis)' started by PetrolAholic, Oct 11, 2010.

  1. PetrolAholic
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    PetrolAholic Member

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    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.
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  2. PetrolAholic
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    PetrolAholic Member

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    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.
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