What is the difference between NASA and SCCA. I know that the SCCA is the Sports Car Club of America, but am not sure what NASA is. also what are the differences between their classes and levels of competition. I have a friend who runs an 86 325i in the chicago area BMWCCA, and ive been to some of those events and have a fairly good idea of how an autocross event works. Thanks for clearing this up and next summer, i hope to get started in the sport. It just looks so damn fun. Thanks again.