heres what I found...
If you run an NHRA National or Divisional race you will need to have a diaper for the Super Comp, Super Gas, and this year - Super Street, classes. Also required for any of the "top" classes. Of course all cars faster than 7.50 (4.50) already need a diaper. The requirement for SFI rated diapers are for the Professional classes (national events) not Sportsman classes.
All correct except it does say 9.99 or faster will require a diaper or belly pan no matter what class.
There is NO wording in the 2012 NHRA rule book for any diaper in the Pro, Super Pro classes or local races.
Now, ANY NHRA TRACK can add restriction in addition to the rule book for their own track races or special events.
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Chris
As close to "Normal" as I can get...
