Lowest category is stock. Kid you'll get by with the RB exhaust but since that was equiped on the MP3 you'll prob be moved from F stock to E stock where the MP3 is. You'd have to take out your Injen though. If you bring your stock stuff we can just put the stock stuff in for the day and then just put it back on after the comp. If you don't want to do that you'll move into Street Prepared or Street Touring S where we will be