After looking at all options ....
I have ordered the Hartge exhaust tips and have taken the dual tips not the single large one which is identical to the V8 4.2 ltr. ,
although the look of the dual tips is not origional for BMW it looks so much better than the 4.2 large single tip. But the cost is shocking 1100 Euro incl. air. but the stock market is picking up so... I may try to post a pic when it is fixed