Rear fogs are mandatory in Slovenia, but I doubt that anyone will notice that it's missing. I also plan to install them in the tail lights eventually.
For a complete NSX brake swap you would need following:
- obviously a set of NSX calipers (with brackets)
- 4x 10mm spacers for the bracket mount point (made from hq heat treated steel) so that the caliper will fit on an NSX rotor
- 4x longer (+10mm) bracket bolts (some hondas use these anyway so it's best if you can find oem ones)
- set of longer wheel bolts (20 pieces) - need to be pressed into the wheel hub
- 4x 10mm (or according to wish) wheel spacers (also best to use hq steel)
- 2 front wheel bearings (you need these because you need to remove the existing ones in order to install longer wheel bolts and they tend to fail after being pressed out once - however, no need to do that in the rear)
- pair of NSX rotors
You need to go with the wheel spacers because otherwise the caliper will probably be hitting the rim. If you run some extra big rims and don't plan to use stock ones or similar at any point, you can also skip this step and save quite some money (no bearings, wheel spacers, wheel bolts)
There's no need to make any other modifications and if you got all of the material above it should be easy to install them.
I personally use 10mm spacers, but I will probably go to at least 12 or more in the future because there's still some reserve now. On the other hand, my rims are only 7" wide and that's probably why 10mm is not "enough".
For the gauges it took quite a lot of fabrication to install them... The friend who made my bumper also made the gauge "tubes" out of carbon fibers. From there on it was just me, dash and a dremmel.
I got the inspiration for putting them half way in and driver orientated after driving 350Z for a day.
I'll let you know on the temp gauge...