PRO STREET: is the quickest and fastest heads-up class in The Ultimate Street Series. Mid 7’s at 180MPH plus is what you will see in this class. From 2004 Mustangs to '33 Five Window Coupe‘s, back-halved cars to full tube chassis, twin turbo, supercharged and nitrous injected, big cubic inched street cars.

Blue Light active, courtesy stage. This means pre-staging and staging by one car is NOT allowed unless it is on a bye run. The allowed procedure is both competitors pre-stage, then one stages and the other stages within seven seconds. Failure to stage within the time limit results in automatic red light for the delaying party.

All USP Racers will scale after every pass. Failure to scale during qualifying means the run will not count. Failure to scale during eliminations will result in disqualification and reinstatement of the losing competitor, providing they also scale and make minimum weight.

Permanently attached ballast may be added in a NHRA legal manner. Removable ballast for the purpose of classification adjustments is limited to 100 lbs. in a NHRA weight box.

Steel, aluminum, fiberglass and carbon fiber bodies and body parts are allowed as long as the car retains it's original appearance and profile. Wheel well openings can be modified for tire clearance. Rear wings are allowed, but may not extend more than 28 inches from the transition point with the body to the tip. The drivers and passenger doors must be fully operational and must open from the outside. USP Reserves the right to add weight for any body modification not deemed acceptable within this rule structure.

USP reserves the right to add weight as deemed necessary to any body style that presents a superior aerodynamic advantage at any time during the season.

Moving stock firewall rearward for engine installation permitted. Each car in competition must be equipped with a minimum of .024-inch steel or .032-inch aluminum firewall, extending from side to side of the body and from the top of the engine compartments upper seal (hood, cowl, or deck) to the bottom of the floor and / or belly pan. Firewall must meet NHRA safety requirements.

The maximum allowable engine setback from the center line of the number-one spark-plug hole to the center line of the front spindle is 12 inches, except in those vehicles in which the engine was factory installed at a distance greater then 12 inches behind the spindle. In such cases, the engine set back may be no further back than the original location.

Gasoline & Alcohol only (No Nitro) USP reserves the right to check gasoline at any time during competition. The addition of chemical additives intended to alter the makeup of the gasoline for increased performance is strictly prohibited. During fuel check, a competitor must identify the brand of gasoline being used. The sample will be considered illegal if it does not match the baseline results (ex. color, dielectric reading +or-.2, and chemical tests) logged by USP. Failure to pass fuel check is grounds for disallowance of the run during competition and disqualification from the event during eliminations.

NITROUS OXIDE: All nitrous systems are allowed. Nitrous oxide commercially available, thermostatically controlled blanket-type warmer accepted. Any other external heating of bottle's prohibited. The use of any agents other than nitrous oxide as part of, or mixed with, this pressurized fuel system is prohibited. Nitrous oxide may not be used in conjunction with supercharger or turbochargers. If entry is teched in at a non-nitrous weight break, all nitrous oxide lines, fittings, solenoids, and bottles must be removed before car will be allowed to pass tech.

Single or multiple supercharger or turbocharger allowed (max twin turbo size is 88.000mm ea.) Screw Superchargers are not allowed. Two-stage superchargers or turbos are not allowed (twin superchargers or turbos must share a common plenum). Intercoolers are allowed. Roots-type size limited to 14-71; 19 inches maximum case length, 11 1/4-inch case width, rotor cavity diameter 5.840 inches maximum, variable multi-speed supercharger devices prohibited. Supercharger restraint systems required on Roots-type units. Nitrous oxide not allowed in combination with supercharger or turbocharger.

Front tires must have a minimum tread width of 4.5 inches. Front tires do not have to be DOT approved. Rear tires have no limitations. The tread of the tires must not protrude outside the body line at the top of the tire.

Cheating will result in mandatory expulsion from event, loss of any points earned at event and forfeiture of any winnings. Mandatory one race suspension with a $500 reinstatement fee. Any competitor protesting another must post a $100 protest fee that is non-refundable.

2007 racers will be able to run their earned class numbers. Example: Bill Bernard-P/S-1. 2008 racers will only be eligible for the points race if they are a registered USP-Racing member.