SO looking for a helmet for my occasional autoX. I really only average 1 or 2 times a year. I'd like to get a few more in. I came across this one http://www.zamp-racing.com/rz16h.html
Any input or someone who wants to sell a 2010 SAH- 2010 or newer

Do you really need the holes and threads for a Hans type brace for occasional autocross?

Go with a SA2015
http://www.gforce.com/products/helmets/3121.php

It is my understanding that SA2015 requires helmet restraint hardware to be built in.

Yup, 2015s have the hardware built in. They may or may not come with the posts already installed though.

If you already have a helmet and don't have the chance to try one on, I'd stick with the same manufacturer. I've found that helmet fitment varies greatly from manufacturer to manufacturer. For me, Bell helmets are comfortable and offer a few models in my price range. I've tried other ones from Pyrotect, Simpson and even high end versions like Stilo that made my forehead hurt. I actually wore a Pyrotect that a team had already wired for their radios in their car, but after about 30 minutes in the car I had a splitting headache. Since I tried on a Bell and bought it, I have not had the same problem.

whoops, missed that specific update, they must've dropped the "H" from the nomenclature on the model I posted above.

Bell open face its pretty light and cooler then full face, get white

http://www.saferacer.com/racequip-of15-sa2...o-racing-helmet