Sounds like there's a few questions on this issue, so I'll clear it up while I have just a second.
So if you have an RA logbooked, RA legal car, it can run at Magnum Opus by passing the RA rules.Originally Posted by The NASA rules
Yes, NRS rules require FIA seats for vehicles that get NRS log books. But that has zero impact on existing RA cars that want to come race.
See you guys up there, regardless of what seat type you're running!