There were 2 different kits. One has the 2 piece rotors that were cross drilled and had 4 piston billet calipers, that I am told are the same ones used as OEM on some Porsches. It came with a radial mount bracket for those calipers. Then there was the lover priced kit that can with 2 piece drilled rotors and a bracket to reuse the factory 2 piston caliper by moving it out a bit.
The latter kit was later taken over by powerslot and marketed as powerslot plus and had 2 piece slotted rotors and the same spacer brackets to move the calipers out. I have those and they have been good, much more stopping power, but the rotors are getting tired and there are no replacements for them.
Jason '99 GSX