5.20 Top Gas Added to Rock Bike Race The 5.20 Index Top Gas class has been added to the March 11-13 Super Bike Shootout at Rockingham Dragway. Due to requests from competitors, The Rock will now offer no less than four heads-up Index classes at the all-bike event. The 5.20 class will join The FBR Shop 4.60 class along with 5.60 Index and 8.88 classes. The event, opening on Friday, March 11 for early pit parking, will offer a $5,000 to win daily purse in Pro ET and $2,000 to win daily in Street ET. Outlaw Street will also be featured along with Grudge Runs. The 5.20 class will pay $400 to win, $150 runner-up and $75 to the semi-finalist, with an eight bike minimum.