Hi,
ZTK is the "track" and cooling package.
Comes with non run-flat Michelin pilot 4S (amazing so far) that are staggered: 225 in front and 255 in the rear.
There are bigger brakes, which precludes having a space saver spare (won't clear the calipers) and an extra radiator/cooler. The cooler is mounted "facing" down under the front of the car (parallel to the ground instead of the normal radiator that is up and down)...
There isn't much/any shielding protecting it. In my Evo VIII I had an aftermarket aluminum undertray to protect stuff in the front, may consider something like that, or just hope for the best.
Thanks