As the thread title states, I"ve been researching several BBK kits offered for the Z and tried searching for my answers to only come up with Z's with BBK's, not the technical info i actually wanted. I'm trying to figure out if my stock brembo system would really have to be upsized to accomadate about 500rwhp. I've seen upgrade kits available with rotors and pads while keeping the stock brembo calipers but would that be enough for auto-x events and such? I'm mainly looking for those who are pushing the power and do spirited or auto-x driving to drop their input but if anyone else wants to chime in, i don't mind, i'm just trying to understand what is really needed instead of buying something that I probably didn't need. thanks guys

 

Autocross and spirited driving are just fine with the stock Brembo system. You don't need anything else unless you run on the racetrack with wide sticky tires.

 

ah ok, then with that comment in mind, my wheels are being upsized from the stocks to 19x9.5 + 24 front / 19x11 + 17 rear with tire specs of 255/35/19 and 285/35/19 with the rear fender rolled. Going off of the previous post, would this upsize be too much strain on the stock system? or am I better off with upgrading the rotors and pads? Also, i understand my wheel/tire setup isn't ideal for auto-x

 

Till you hit the racetrack(not autocross), you are fine with stock rotors and pads.

 

k, thank u