I contacted APR because I wanted to know if their APR GTC-300 Adjustable Wing would fit into the stock OEM wing holes in my evo x. I can't seem to find this answer... so they emailed me back he said,

"The wing for the Evo x drops into the factory wholes as long as the car cam
with the larger Factory wing. cars with the smaller base model wing you will
need to do additional drilling on.*"

Well... I thought our mitsubishi evo x came with the same wing... am I missing something here? Their is a wing that comes stock with the 2014 lancer Evo X GSR?

 

There is a smaller wing that comes on the base Evos like you would see on the lancer GTS. The larger wing is an option. That's the one that blocks your sight right in the middle of the rear view mirror. If you can't see anything in the center of the rear view mirror that means you have the large wing

 

^ Awesome. that means i do. thx!