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7. Once the new five-lug pattern was drilled, we machined the lip off of the brake rotors to allow our aftermarket Boyd's billet rims to fit onto the Ford Expedition rotors. This also worked to square the mounting flange of the rotors after the welding heat had warped them. The old bolt pattern is barely visible, and we now have five-lug parts for less than the cost of a new set of high-performance rotors.