Hmm...ive been battling the vibration issue for a year or two now. First i bought some kit off ebay that had cheap ass control arm bushings...so i bought oem bushings for the lower control arms and tried to press them in the cheap arms but the holes in the arms were way to big so i had my oem arms still but with 130K miles on them i was hesitent on using them cuz of the ball joints. they were very loose. So i pressed new oem bushings into them and overall no more shimmy on bumps etc. but at 80mph I get a front end vibration the steering wheel doesnt move or anything i just feel a vibration. The tires are new and balanced. I wanna blame the rotors but it has no impact on the steering and i dont feel anything through the peddle....but there is a definite vibration .....anyone have a clue? im not sure if a flex disc will cause this.....