Helmet ?

[HottestZ28]

what is the most up to date rating needed for racing
I have seen on thunderracing RCI helmets that are snell and sa-2000
I want to get a helmet for this year and rated for racing.

[fastTa]

These are the latest 2006 revisions that I have seen:

Drivers of all cars running 13.99 or quicker must use a helmet meeting Snell
95, K98, 2000, 2005 or SFI 31.1, 31.2, 31.1A, 31.2A, 31.1/2005, 41.1,
41.2, 41.1A, 41.2A, or 41.1/2005

Drivers of cars running faster than 7.49 or quicker must use a helmet meeting
Snell SA95, SA2000, SA2005 or SFI 31.1, 31.2, 31.1A, 31.2A, or 31.1/2005
Specs.

Snell 90 will no longer be approved at any NHRA sanctioned event.

[HottestZ28]

ok so now if i get a helmet now will it be good for 5 years regardless of the rating within spec for this year and how do you know what year it was made when ordering online?