IMHO the schnozz is far more protruding than needed. It may also prove a hindrance for obstacle clearance and maybe parking. At the tail I would think the wake zone AREA as pictured is the same as stock but the quality of the aft flow should be better. IMHO "Kamming" it down to a smaller cross sectional area at the rear will bring greater gains. Otherwise lookin' good!
Don't do this:
Long schnozz, big butt, didn't seem to help.