I have several friends that track Z06's, some of them very hard. The stock Z06 cooler is adequate if you don't push the car that hard, but if you beat on it you will need an after-market setup to keep the temps down. The stock brakes are acceptable, although the rotors and pads are crap and should be thrown away for track duty. The stock brake ducts dump air behind the wheel but that's about it, there are kits to replace with proper brake ducts into the hub area. The big problem with the Z06 is if you actually hit anything, the frame is aluminum and the tub is carbon fiber. A friend backed one into the wall on track a few months ago, and what we thought was going to be a few thousand to fix ended up being a write off.
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