mfdk

The car is an 08 550i with msport package, removed the stock muffler, removed the rear resonator and added a Magnaflow muffler where the resonator was, then 2.5 pipes all the way out with custom tips.

Let me know if you need any info, i will be adding a clip of cold start, idling and high revs.

spunkmtb

What does it sound like. Is it a loud drone in the cabin. I need to add an exhaust but lost as to what direction I should go.

mfdk

There is absolutely no droning, it has a deeper sound to it more like a muscle car.

I will upload a clip hopefully tomorrow.

mfdk

Here the clip..

spunkmtb

That sounds really nice

stel_i79

adding a clip of cold start, idling and high revs.
from the back of the car seating at 2-3 feets away
plz and thx u

mfdk

The recording never actually does justice, its not the same as hearing it in person but here is the best i can do..

spunkmtb

Thanks for the thread and giving me the motivation to get this done. I ordered a Borla ProXS muffler. I'm going to delete the resonator and go 2 pipes all the way back to the muffler. I purchased a dual inlet/outlet Borla miuffler. I'll let you know how it sounds.

mfdk

You won't be disappointed as long as its done right you'll love it.