I don't think there's been that many been fitted yet, mainly because they don't yet have a replacement exhaust manifold. I know it should fit the stock one, but the stock BAM manifold is considered by many to be too restrictive for higher power outputs, I would guess while you've got the turbo off, you might as well replace the manifold at the same time.
Be careful and confirm your fitment with them, I don't know if anyone has confirmed that the GTRS and the GT2X will fit a 2WD BAM as they don't have them over there. I guess it probably will, but worth checking.
If you're targetting that level of power, you might want to look at upgrading the internals, although the power/torque levels that the standard internals will reportedly take seems to increase on a monthly basis. Also need injectors too.
Time to do some research!