Vrsf should just buy a set or ar's and duplicate. Problem solved, takes out the guess work and any possible fitment issues. Maybe that's what they are doing, makes the most sense. It would be cool to have a full 3" dp though.
2008 335xi AT
Cobb AP stage 1, drop in filter, the rest stock
email@example.com w/ 1.86 60' (5,800' altitude)