If you aren’t concerned about machining the rotors in the future, you can hog the center with a die grinder. We saved cash on these Centric rotors by purchasing them from Rock Auto, but they’re still not as cheap as the $10 to cut them for future brake jobs, so we had the centers milled correctly. We knew going in that there might be some fitment problems and that the rotor interfered with the caliper mount. Taking down the OD of a rotor with a grinder can lead to some funky out-of-balance situations. Fortunately, any place that can cut drums can also machine down the OD of a rotor. The original OD was 13.23 inches. We cut it to 12.75 inches to clear the caliper mount, retaining bracket, and caliper.