I do all the time. Buy one a hair too large for car duty, you'll thank yourself as you can quickly slide it on in the staging lanes and off on the return road.
Anything Snell 2005 or newer is a-ok on the track.
HJC makes good kit for not too much money. I use them for both bike and car racing, plus touring around. However, for MC use, a snug fit is much more important, obviously.