sure, go to the Stars and Stipes race, i think. Its the all american race. You'll know you are in the right place if you have a C5R on your ass. Its a 5 track series with Super Speedway being 3rd.
P.S. there a several cars you can win in that race, to get the camaro, before you exit the last race, on the screen which will have the save button disabled and the next available - the screen right before the Congradulations, go into and out of Options 2 times and then click next to go to the Congradulations screen. If you dont do so, you migh get a stupid RX-7