The Coupe is pseudo-eligible for CAM-S at local region events, unless your organization is run by fire-breathing heathens who adhere to every letter of the SCCA Classing Appendix. After all, it's basically a hard top Roadster (C0br@), right?

It's certainly legal in XP, but unless you're a hot shoe it'll be tough to claw back from that PAX. Raw time you'll be rocking though!

Coupe > Challenge Car for autocross purely based on wheelbase alone, looking at this from a high level. Roadster is 90" and coupe is 95". Both are between Mazda Miata and Mini Cooper dimensions. With horsepower and torque several orders of magnitude higher! You have to be FAST on the controls to keep the Roadsters pointed where you want them...and keep them there. They like to "rotate" with little warning, from what I've seen/read. Jeff K would be one to talk to about this. [Note: I do not own or race one personally, so take everything I say as heresy until proven otherwise.]