528 with n20 engine and active flap exhaust
I just purchase a new 2012 528i xdrive and ordered a of front spoiler and rear diffuser from Vorsteiner. I need to modify the exhaust on the 528 to have dual one.
Since nobody offers an exhaust for the n20 engine, I need to have a custom one made for my car.
I just realized that my exhaust use an active flap on the exhaust, I guess is to create back pressure at low rpm or something like that. If I do not install this butterfly valve in my exhaust and I completely bypass it, will I have a check engine light or will my car run rough?
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