Have Stoptech rotors and ProjectMu Bforce pads on all 4 corners. Put them on less than 8 months ago and already have steering column vibration beween 60-75 mph and it feels like the chassis is shaking a bit too. Have recently balanced/rotated tires. Had the same problem with the stock Brembo's, hence the replacement pads/rotors. I cannot figure out what is causing this. The front, passenger brake squeels like a pig under hard braking, but none of the others do it. I have been told by numerous shops that the sound is normal due to the racing pads/rotors. Not a fan of turning the rotors, never did it on ANY of my previous cars. Thinking that one or more of the calipers is defective..Any one else experience this? Any suggestions? Thanks!!!