Hello there and welcome to the BMW Car Club of America.

If you are a BMW CCA member, please log in and introduce yourself in our Member Introductions section.

Muffler Delete

Discussion in 'E85/E86 Z4 M roadster/coupe (2006-2008)' started by m31947, Jan 11, 2010.

    m31947 guest

    Post Count: 10
    Likes Received:0
    In so many forums, I have read that if you replace the rear muffler on a Z4 M series with a strait pipe, then it has been stated that the low end of the power band is greatly reduced. I am probably wrong, but with the header cats, resonators and the 2nd set of cats, there would be a great deal of back pressure.
    If there is still back pressure needed, then what size rear pipe could be used ilo the muffler to create the necessary amount of back pressure to have good low end?

Share This Page