Class Description Krazy Koncepts Performance Outlaw Outlaw Street is a heads-up class for all types of vehicles. Rear suspension may utilize ladder bar or four-links (no full tube chassis). Front suspension and frame must remain stock. Legal combinations include the use of nitrous oxide, superchargers, turbochargers and normal aspiration. Multiple power adders are legal in this class. Rrev Motorsports True Street True Street is a mid-level heads-up class reserved for “Street Appearing” vehicles. Legal combinations include the use of nitrous oxide, superchargers, turbochargers and natural aspiration. On a 30"X10.5" maximum size tire.  Drag Radial Drag Radial is an entry-level heads-up class reserved for “Street Appearing” vehicles. Legal combinations include the use of a single power adder such as nitrous oxide, supercharger or turbocharger. 27x9 or smaller drag radial tires only.