I could've sworn I read some posts by people saying the rear diffuser was a direct swap. I am looking into the mounting brackets, they're on opposite sides so does that mean that the 2017+ bumpers are different than the ones prior?

2014-2016 3IS rear diffuser:
https://www.ebay.com/p/2292312795?iid=372717427260&chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=372717427260&targetid=915850255573&device=c&mktype=pla&googleloc=9004032&poi=&campaignid=10454522093&mkgroupid=104612009740&rlsatarget=aud-762207186714la-915850255573&abcId=2146002&merchantid=6318714&gclid=CjwKCAjwxqX4BRBhEiwAYtJX7YogtLLuZHZH_7VbjAwOslZ34dArPuRvQfWiwrT2hjGci_ztiBeIARoCSSIQAvD_BwE

2017 3IS F sport rear diffuser:
https://www.carparts.com/details/Lex...E&gclsrc=aw.ds

 

Nvm, I just realized there's different angles, there's 2 mounting points which are at the top and bottom which the pic doesn't show. Sorry about that, looks like it is a direct swap

 

direct swap, had mine done yesterday.

 

yep easy direct swap, did mine last week and my bolts on reflectors either melted or was super glued by previous owner lmao was a pain getting them out