Have 2016 crosstrek. Bought oem hood deflector. Mounting holes under hood for the 2 main clips don't line up. Also, the two main clips don't reach far enough to put the white plastic expansion tab thru into underwood hole.
I've put them on our 2013 and 2015 XVs. I didn't think there were any changes to the hoods on the 2016s ... just some changes to the front bumper cover. It might help if you had someone hold the deflector in place and take some pics to post.