Steering wheel vibration when braking

When I press on the brakes, my steering wheel begins to shake. I thought my rotors could be warped but I just got my 2-piece rotors like 3 months ago.

My installer told me that it's the front control arms because my 4 piston brakes are doing something to make them flex (I forgot what he said).

We installed Cobra front control arms (P/N M-3075-D) and the problem got better. It doesn't vibrate... as much now. There's just a little bit of steering wheel vibration now.

Does anyone know a probable cause? My installer told me to come back and check for "rotor runoff."

thanks guys. when i got my cobra control arms, i saw my stock ones pulled out and they were really out of whack. The bushing was squeezed position. my new control arms solved about 80% of the vibration but there's still some left.

i believe the problem lies with what you guys mentioned... the rotors