[Rich Biebel]

Strange rotors got the nickname "lettuce shredders" on dragsters for the same problem......My car had a pair of Strange rotors that did it and I only discovered it during the off season......I bought the car used and had run it quite a bit before I noticed those splits in the rotors...

They sell a 2 piece version and a stainless version

I switched to Mark Williams brakes after throwing to many rotors in the trash after not a real high number of runs....and also tried Wilwoods.....they don't split but they warp.....