Quote:
Originally Posted by ///M Power-Belgium
Yeah , back in 2012 I've done the mod. by myself .
First I test drove with the ///M Performance exhaust , Akrapovic and Eisenmann.
And honestly I didn't liked the sound of these...Because there's also something like sound quality ..
So I decided to perform the Oem. exhaust mod . I replaced the 2 big perforated pipes by 2 full stainless steel pipes .
It was an experiment for me and I thought : If I fail , or don't like how it sounds like , I just buy a new BMW Oem. exhaust.
BUT !
I was was blown away by the sound . It sounds fantastic , and with zero drone .
Today I still love my Oem exhaust mod . It wakes the ///M S65 V8 really up !
During the cold start cycle It's loud ,It can be quiet when you drive normal . But when you step on it , It's like a race machine ! The sound quality always remains great !
My friend , for further questions you can always PM me .. 
Video shows the DIY of the mod
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Thanks for putting that on. So it's just to remove lengths of the holed pipes ''inside'' the boxes to make a more convincing sound and the gain of extra hp that comes with it. Well done for doing the job yourself!
On mine I have an Exhaustmeister with remote that closes up the outer pipes on start up then when warm I open up the outers with a push for sporty race car sound
