MARRS as oppossed to SARRC. you had to choose to be in one group or the other. Kinda weird... Had to races for the same group. (ITS had 2 1st, 2 2nd, 2 3rd, ect.) If you ran as a MARRS car it also cost SARRC $10.00 more for MARRS fees since it is a SARRC race. Entry fee was the same for the drivers but the SARRC region had to pay the dues. And no you could not run in both classes you had to choose when you registered.