All perfect for 2001 Hyundai Elantra. There are a few small screw holes that don't line up with the rotors. Factory brake rotors use two bolts to hold the rotor in place when the wheel is removed, but they aren't really needed and many cars don't use them. The brake assembly and of course the nuts holding the wheel in place make everything very stable. The bolts are really just an added convenience when servicing the brakes. This braking system works as if the car were brand new. Stops very gently. No more shutters and squeaks.