Peter Gregg (GTO)
Bob Bergstrom (GTU)
Maurice Carter (TO)
Dave Nicholas (TU)
John Magee (TU)
Mistrz producentów
Porsche (GTO)
Porsche (GTU)
Chevrolet (TO)
BMW (TU)
| Runda | Tor | Data | Klasa | Kierowca | Pojazd | Zespół |
|---|---|---|---|---|---|---|
| 1 | Sebring Sebring 12 godzin | 1973.03.24 | GTO | Porsche Carrera | Dave Helmick | |
| GTU | Porsche 911S | Don Lindley | ||||
| TO | Chevrolet Camaro |  Vince Gimondo | ||||
| TU | BMW 2002 | Jim Grob Racing | ||||
| 2 | Daytona | 1973.04.21 | GTO | Porsche Carrera | Brumos Porsche-Audi Corp. | |
| GTU | Porsche 911S | Bob Bergstrom | ||||
| TO | Chevrolet Camaro | Carter Racing Services | ||||
| TU | BMW 2002 | Jim Grob Racing | ||||
| 3 | Pocono | 1973.06.10 | GTO | Porsche Carrera | Toad Hall Motor Racing | |
| GTU | Porsche 911S | Bob Bergstrom | ||||
| TO | Chevrolet Camaro | Carter Racing Services | ||||
| TU | Mazda | Z & W Mazda | ||||
| 4 | Daytona | 1973.07.04 | GTO | Chevrolet Camaro | Gene Felton | |
| GTU | Porsche 911S | Bob Bergstrom | ||||
| TO | Chevrolet Camaro | Carter Racing Services | ||||
| TU | BMW | | ||||
| 5 | Mid-Ohio | 1973.07.15 | GTO | Porsche Carrera | Toad Hall Motor Racing | |
| GTU | Porsche 911S | Bob Bergstrom | ||||
| TO | Ford Capri | Ausca, Inc. | ||||
| TU | BMW | Auto Sport by Jiri | ||||
| 6 | Lime Rock Park | 1973.09.15 | GTO | Porsche Carrera | Toad Hall Motor Racing | |
| GTU | Porsche 911S | Bob Bergstrom | ||||
| TO | Chevrolet Camaro | Warren Agor | ||||
| TU | BMW | Auto Sport by Jiri | ||||
| 7 | Lime Rock Park | 1973.09.15 | GTO | Porsche Carrera | Peter Gregg | |
| GTU | Porsche 911S | Ludwig Heimrath | ||||
| TO | Chevrolet Camaro | Warren Agor | ||||
| TU | BMW | John Magee | ||||
| 8 | Road Atlanta | 1973.09.30 | GTO | Porsche Carrera | Peter Gregg | |
| GTU | Porsche 911S | Ludwig Heimrath | ||||
| TO | Ford Capri RS | Ausca | ||||
| TU | Nikt nie ukończył wyścigu | |||||
| 9 | Indianapolis Raceway Park | 1973.10.14 | GTO | Porsche Carrera | Peter Gregg | |
| GTU | Porsche 911S | Ludwig Heimrath | ||||
| TO | Ford Capri | Ausca | ||||
| TU | Mazda | Z & W Mazda | ||||
| 10 | Daytona | 1973.11.25 | GTO | Porsche Carrera | Peter Gregg | |
| GTU | Porsche 911S | Ludwig Heimrath | ||||
| TO | Chevrolet Camaro | Warren Agor Racing | ||||
| TU | BMW 2002 | | ||||
