Frozen slotted rotors are simply the best brake rotors money can buy. Serious drivers-those who tend to cross the finish line first--take their edge where they find it. And a growing number of them have embraced the edge that they ve found in cryogenically treated brake rotors. Here s why: they resist cracking, warping and fading; frozen rotors last 2-3 times longer than normal rotors; they stop consistently, lap after lap. Sold each.