I called my local dealer, sent him the above link and still they have no idea what I am talking about. Would a DINAN software upgrade do the same thing?

Dinan software will do the following:

Performance Engine Software extracts additional power as well as improving drivabiltiy. The software safely raises the rev-limiter by 100 rpm, enabling you to carry more road speed in each gear, as well as optimize shift points. The top speed governor has been removed, enabling the cars to reach their natural top speed. Revised EML tuning provides improved drivability by speeding up throttle response.

The TSB is for MY 2005 and 2006 X5's with M54 engine and GM5 Trans

So does my year/engine type have an update?

hey guys, how much does a Dinan upgrade usually cost? is it alot? do i have to take it to the dealer? thnx