I think you guys thinking about dpf and egr deletes should contact skm32us on the bimmerfest e9x forum.
http://www.bimmerfest.com/forums/sho...086&highlight=
Seems like he's gotten things done.
Here's a summary (he's been posting for a very short time, in only two threads): "I have stated facts about my specific vehicle, the dyno tune was done by myself, a programmer friend of mine, and a very nice guy in charlotte that own a dyno shop, I wouldn't advise a person re-tune their vehicle to the level that mine is at , simply bcuz most people want to be able to keep their warrenties ect , mine is out of warrenty . I am a huge gear head to start with, and I am an auto engineer, to tinkering with vehicles is what I do anyway."