My question is the brembo setup off of a grand touring z worth the money compared to a non brembo z would i be able to tell a difference and does it have bigger rotors

 

This question has been answered many times over. The short answer is yes, the Brembo brake package does make a difference. Not in overall stopping distances, but repeated hard use of the brakes will find the Brembos superior in almost every way. The Brembo monoblock calipers and larger rotors resist heat much better and are worth every penny at the track!

 

Thank yoiu for answering my question on another note i just installed bc racing coils and cobb sway bars at 70mph my car vibrates like crazy. i cant figure out what it is i had the car realigned and it still does it. my ride height in the front from the bottom of the fender to the ground is 25 1/2 set on 25 the rear is 26 1/4 at 23 dampening settign i installed the rear before the fron and drove it for a day or two and when i got on the interstate from 70 to 80ish it vibrates really bad cant figure out why any suggestions or anybody with expertise in this field live in knoxville tn that woudl help me

 

To clarify dkmura's response - a BBK shows it worth on the track, not in everyday driving.

As for your vibration problem, unless something was not tightened properly and it's loose, those suspension changes wouldn't normally cause a vibration. I'd suspect something with the wheels/tires. Perhaps you have hubcentric wheels and a ring was removed/lost and now the wheel is not mounting properly.

 

Less heat build-up.
Less brake fade.

How important is this to you? $2,000? $3,000? I don't know.