here is a sick clip of a guy (Sorry Mavrick, I didn't know it was you and that you talked on this forum till I searched on here) with a 2002 X5 4.4i with muffler delete, YouTube - BMW X5 4.4i Exhaust Muffler Delete

BUT I'm wondering IF the fact that the engines are different, will they create much of a different sound?
I am VERY VERY close to doing this muffler delete and finding some 2.25" pipe to run to the rear with some new tips.
Sounds SICK in this video.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S