response from inside performance about the jb4:-
you can connect the Display and it will work in general..
because jb4 is no "clean" tuning and it manipulates the bus data in a very "rough" way, we can only use the bus data that still remains after jb4 manipulation..
typically the boost pressure signal is destroyed.. most other functions should work perfectly.. we have a lot customers using it with jb4.
We cannot guarantee exactly which functions work and which do not - because you have so many setting options in jb4 and the software releases chance often in their solution..
but you will love our product! Furthermore you have the option to add additional sensors to the display - so if a function does not work out of the box (like boost), you can oder our external sensor package (sensor included), connect it, and you have the missing value..
2009 BMW E92 M3