It looks like those of us with convertible XKR's might have options at NASA & SCCA track events. Without adding in roll bars

for HPDE, The Jaguar XK8/XKR is one of the "allowed" cars at NASA sponsored events

FAQ | NASA Northeast


Check out - "Are convertibles allowed at track events"

not sure about SCCA -

https://www.scca.com/pages/rules-and-regulations


Not sure, if there is an option to add a temporary roll bar with minor modifications

 

Yes, they let me take my convertible on the track.