Quote Originally Posted by Spock View Post
Brembo rotors are hardened & cannot be machined
Replacing ordinary rotors gets you a part warranty, machining does not so you have to figure out the difference
With all the brine they spray on the roads, its hard to find a rotor worth machining these days.

If its a summer car that's stored & the rotor is in good shape, I could see machining a warped rotor with a ProCut as a stress relieving process that would make it a better product
It might just be that the calipers are from Brembo on the ATS (unless Brembo makes the OE pads/rotors for GM for this application) but this is a Cadillac dealer that is quoting machining as part of their brake service (pads and rotors) instead of trying to sell me new rotors. I asked them if they don't just replace the rotors with the pads and they said in most cases, no.

These are daily driver cars.