Race weekends included two standing start fifty-minute races – one for the Grand Touring class and another for the Touring Cars.

• Grand Touring (GT) – The GT class rules accommodate an extensive range of vehicles from different manufacturers. There is no limit to the engine displacement in this category and cars may use a forced induction system. To stop the cars, alternative materials may be utilized for the brake pads and shoes. Rules also allow the use of four-piston calipers but rotors are limited to 14-inches in diameter. The maximum diameter of the wheels is 18-inches and any changes to the bodywork must be approved. The series uses a spec tire and competitors race on Toyo Proxes RA-1s.
• Touring Car (TC) – The Touring Cars are limited to an engine displacement of 2.8-liters. The motors must be naturally aspirated (turbochargers or superchargers are not permitted). The Touring Cars are also allowed four-piston calipers and alternative materials for the brake pads and shoes, but the maximum rotor diameter is 12-inches. Wheels in this group are limited to 17-inches. Cars can be fitted with a spec rear wing and approved aftermarket bodywork. This category also uses a spec tire from Toyo – the Proxes T1-S.

To prevent any driver/car combination from dominating the class and ensuring tight competition, the R.E.W.A.R.D.S. System was implemented. Introduced in 1995, R.E.W.A.R.D.S. is the acronym for ‘Rewarding of Equalizing Weight Assigned to Reduce Driver Sensitivity.' This weight equalization rule adds or removes ballast from a car based on the finishing position of a driver.

There were nine-race weekends during the 2004 season with a double-header events fore each class. Touring Cars would race Saturday and Sunday at Infineon Raceway and the Grand Touring competitors would have a similar format at Mosport International Raceway. The opening round was in March at Sebring International Raceway, Florida, followed by a two-month break before teams travelled to Lime Rock Park. The third race weekend of the year was at the Mid-Ohio Sports Car Course. In July, the teams trekked west for races at Infineon. Competitors stayed on the west coast for races at Portland International Raceway. Next, the championship made its only Canadian stop at Mosport. Returning south of the border, the first stop was Road America. The penultimate round was held at Road Atlanta and the series finale took place at Mazda Raceway Laguna Seca.

Round one of the 2004 SCCA Pro Racing Speed World Challenge Touring Car Championship was held at Sebring International Raceway as a support event for the 12-Hours of Sebring. Thirty-four Touring Car drivers would compete in a fifty-minute race around the seventeen-turn 3.74-mile road course. A twenty-five-minute delay during the race - to remove a stuck wrecker – meant that there were only seventeen laps of racing.