As the first sets have been shipped, I'd like to update installation information.
please refer to page(s) 20-6 and 23-252 in the online service manual for door panel removal and mirror removal.
http://www.nsxprime.com/FAQ/Reference/1991_svcman/1991servman.pdf
Do not attempt to remove any or part of the oem mirror from the outside. The entire mirror assembly is removed by 2 nuts on the inside of the door (see page 23-252 in service manual) and the new mirror installs in the reverse. It is helpful to have an extra pair of hands to hold the mirror while you are loosening the nuts from the inside of the door and also when re-installing.
You will need to swap the metal harness bracket from the OEM plug to the new mirrors. There is a small release clip on the plug that lets you slide it out. Sense the new mirror harness uses the same plug, it will reinstall the same way it was removed. This bracket is important to keep the wires out of the door windows way.
DO NOT OVER TIGHTEN THE NUTS when replacing them on the new mirrors. The spec is ~7 foot pounds. Because the new mirrors are composite (carbon fiber) it will damage the housing if they are to tight.
If you have any questions or concerns, please contact me directly.
Synth19 is going to get some pictures of his on his car (non-widebody). I did not have a "donor" car handy to take any pictures myself.
Starting second group today.