I had significant wobble/shake when braking from high speeds so the brake guys I talked to said I might have had a warped rotor. I ended up getting all Motorcraft OEM parts with free shipping and no tax from amazon for just over $400 - local Ford was over $700 for same parts. I didn't want to take a chance on a possible warped rotor so I spent slightly more for brand new ones. Might be worth a shot online to compare prices before doing either.