Originally Posted by m3an
sorry to say but most mufflers are not made for the m3. they are generic mufflers used on our setup tailored to fit.
They are almost certainly tested and setup for that specific cars engine note, along with the piping and bends..its akin to tuning a musical instrument....
The internal construction of the mufflers is what limits drone anyways ..as I said I run Magnaflows on my daily .. it drones..but I dont really care..would I want that on my M3?..probably not.