No it's not. The 09 airboxes were updated to a one piece design. BUT.......It has been a recommendation to update the earlier airboxes to the later one piece (09-10) design. The 07-08 2 piece style do not seal very well and let lots of belt dust into the t-bodies which goes into the motor.
The 07-08's had the detached piece that attaches to the throttle bodies and then that piece attaches to the main airbox. This allowed huge gaps for underhood air to enter the motor. The 09-10 airbox eliminated that piece.
I "believe" the 700 and 800 airboxes are the same. I would look up the part number for the airbox for an 09 800 and an 09 700 and see if they are the same but I would bet that they are. If they are, then it will work. I would also strongly recommend that you seal the split seam in the airbox as best you can with some gorilla tape.