you can go thru the plastic wheel liner just pop out the plastic screw's and lift the wheel liner a bit and stick you're arm thru and unbolt,reverse the process to install what i imagine carbon fiber vent's lol hope this helps

 

i am actually removing them to paint them satin black.. they are color matched RR and it is kinda weird to me.. i am replacing the center vent on the hood with a C-WEST carbon vent, then painting the smaller front vents, the front grill bar, and the fender vents

 

^exactly. They're only held on by adhesive and plastic clips. Once your arm is in just pinch the clips in and push out. Don't worry you won't break them. Also helps if it's warm out.

 

Turn wheel remove wheel liner and pop them off kind easy do

 

This will help, i used this to take mine out.
http://www.utahpace.com/evo/evo_x_fender_trim_removal.pdf

 

i literally just did mine 5mins ago..i didnt care for the plastic clips breaking so i just pulled it off lol