options were things like caliper relocation brackets that allow you to use 350Z 12.75" rotors. A kit like that increases the front caliper brake torque and also fills in the wheel a little nicer with the larger rotor size. I installed a 12.25" wilwood kit on my pearlZ that MattZ Garage was offering a while back. It gave me the additional braking performance I was looking for for the few times that car sees the track w/o breaking the bank.