http://www.usa-east.com/     http://www.cotpc.com/                                                DEFINITION OF CLASSES   RWYB = Modified 4x4 Trucks (RWYB Series)                            StreetDIESEL = 8000lb. Licensed Diesel 4x4 PSDiesel = 8000lb. Pro Stock Diesel 4x4 Trucks                     StreetGAS = 6200lb. Licensed Gasoline 4x4 ‘Posse’ = Pennsylvania Posse Street Semis                                Street Semi = Off-the-Highway Semi Trucks “SMOKERS” = 10PS + 95SS Tractor Combo                            MOD – Modified Tractors Super Stock – Super Stock Tractors                                              TWD – Two-Wheel Drive Trucks LimPro/SF = 8700lb. Limited Pro and 9300lb. Super Farm Tractor Combo BIG RIGS – Big Rigs Pulling Series (Modified Semis)