This is my 1.6 Miata:
Daily driver in the summer, occasional autocross and track days. While it looks stock, it has quite a few modifications to the suspension, ECU, intake, and exhaust, as well as a racing seat and harness (not in this pick) and roll bar. Over the winter I plan to build another 1.6 to swap into it with increased compression.
This year I had a chance to run it on Michigan International Speedway, a huge concrete oval. Top speed was 104 with top down and a passenger, which is not very impressive, but obviously this kind of car wasn't made for NASCAR tracks.
I hope to improve on this quite a bit when I go with the Alfa club next weekend.