1. AROSC has an Open Race group. We regularly have a number of Miatas running in our races - Spec Miata, SPM, and run what you brung Miatas.
2. A number of our racers use the NexGen neck & head restraint system. I use one myself and don't even know I am wearing it.
3. Blackbird Fab Works gets a lot to good press here on TrackHQ about their cages.