07-01-2009, 11:51 AM
Greetings Randal, Our requirements for a helmet is that it be either an "M" or "SA" 2000 or newer. A new spec will be coming out next year (2010) which will make the 2000 requirements obsolete. Open face or full face is your option. Some Porsche regions require an "SA" helmet to run DE (I don't have the faintest idea why), so make your purchase on how many different regions you will be running with. Most important is that it fits well.
Be safe,
Wally
Be safe,
Wally