For those who are going to replace their yellow reflectors with the clear or carbon fiber (or other) ones, here's how to do it. You don't have to take the bumper off. Here's how I did it:

- from underneath, remove the splash guards in front of the front fenders (held on by plastic plugs)

- unbolt the washer fluid reservoir from the right side (it will need to be moved out of the way to unscrew this side reflector). This may require removing some wheel well plugs to get to the bolts.
*I think this uses a 10mm socket wrench

- using phillips screwdriver, remove the reflector plates from the inside, then remove reflector

- install replacement reflector (not sure about yours, but mine used the stock screws)

- bolt the washer fluid reservoir back into place

- replace the splash guards

DONE!

Discuss this how to here.

 

for the driver side just remove 4 clips from the splash guard and you will get a open space in the bumper where the reflectors' screws are..

 

heres the passenger side.. it was actually kinda tough getting to the screws.. even after you unbolt the reservoir.. there are connections that hold it together.. just drop the reservoir as much as possible and get in there over the top of it..