If you are planning on tracking, brakes and oil cooler are an absolute must. Car and Driver did a test of "The Best Handling Car Under $40,000 (USD)". The Z lost major points because (quoted from the article)
"
Even on the road drive, and despite the fitment of $580 NISMO brake pads and the $3030 Sport package, the Z’s brakes faded noticeably. We had to cool the stoppers repeatedly out of fear of failure. Then, while lapping Grattan, the engine-oil temperature reached roughly 290 degrees, and the car adopted a low-power mode for self-preservation. This required even more low-speed driving to cool things down. Not fun.
Thus, we were limited to just one hot lap at a time."
It's a common complaint of anyone that tracks the Z. It will overheat. Lots of car test articles out there that say the same thing. It's a known problem. If you drive it normally on the street, you won't go into "limp" mode or have any overheating issues, but hit the track without mods and you won't last long.
As for the NISMO being dicontinued, it's no wonder. There were only a handful that came to Canada and they didn't sell well at all. Some are still out there in the showrooms. Heck, the Z itself is a poor seller and constantly shows on the the lowest selling cars in Canada list. Personally I like that! I like having a unique car.
As for the NISMO, there are plenty of Z owners like me that think it's just plain ugly and ruins a very sexy car by making it look like rice.
But, if you want one, you can find them.
http://www.autotrader.ca/a/Nissan/37...0463114424224/