Quote:
Originally Posted by Iron Man
Poorly cast and heat treated cast iron rotors can warp, even if properly torqued. That is why cryo-cooling rotors will also help prevent warped rotors.
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As an aside, the reason most US vehicle manufacturers originally located in Michigan (and some other cold Midwest spots) had to do with "stabilizing" cast iron engine blocks before machining them. They would take the "green iron" blocks (newly cast blocks) and leave them outside in the snow and cold for a season or two before machining them.