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for owners with 4/99 and newer 7.3 4x4's experiencing problems with braking and or continuous warpping of rotors here is a solution. The new Performance Friction rotors will not warp. The material used in these rotors is the same being used by nascar and most other racing series. My 4x4 ex stops much better also with the use of the PFC pads. Take a look and call if you have any questions. http://www.carolinaclutch.com/brakes.htm
You all might want to check out Performance Friction's website. On it you'll see their new two piece rotors which I think will be even better. The two pieces eliminate any out of flatness condition that may exist between the rotor and hub.