snell rating

A snell rating is good for 10 yrs in almost all forms of motorsport. A snell2000 rating is good through this year, a snell2005 rating is good through 2015, and a snell2010 rating is good through 2020. Most tracks will accept an M rated helmet, although I would recomend a K rating or SA rating. The SA has the fireproof lining which is required if you ever move up to tin tops, the K rating has the same shell, just no fireproof lining.

As usual, the better the helmet the safer your noggin. And to borrow the old line, if you have a $5 head, buy a $5 helmet.