The "kit" that I have and seveal others in the Z community is from JSK (link I have is broken) Basically it was rotor hat, cailper braket, and lots of bolts. You supplied the calipers, pads, rotor, brake line adators, and anything else that came up. I have about 700.00 or so into the kit. At the time I bought the JSK stuff there was not a Wilwood kit in the market now Dave at Arizona Z has two kits for the ZX. I would have bought one from him. It's been kinda a pain getting all the right stuff together. Here is the link http://www.arizonazcar.com/510brakes.html. I would have gotten the 13" kit if it was out when I got started.