Dave Cowart (GTO)
Lee Mueller (GTU)
Mistrz producentów
Porsche (GTX)
BMW (GTO)
Mazda (GTU)
| Runda | Tor | Data | Klasa | Kierowca | Pojazd | Zespół |
|---|---|---|---|---|---|---|
| 1 | Daytona | 1981.01.31 - 02.01 | GTX | Porsche 935 K3 Turbo | Garretson/Style Auto | |
| 2 | Sebring | 1981.03.21 | GTX | Porsche 935/80 | Bayside Disposal Racing | |
| 3 | Road Atlanta | 1981.04.12 | GTX | Porsche 935 K4 Turbo |  John Fitzpatrick Racing | |
| 4 | Riverside | 1981.04.26 | GTX | Porsche 935 K3/80 | John Fitzpatrick Racing | |
| 5 | Laguna Seca | 1981.05.03 | GTX | Lola T600 - Chevrolet | Kent-Cooke/Wood Racing | |
| 6 | Lime Rock Park | 1981.05.24 | GTX | Lola T600 - Chevrolet | Kent-Cooke/Wood Racing | |
| 7 | Mid-Ohio | 1981.05.31 | GTX | Lola T600 - Chevrolet | Kent-Cooke/Wood Racing | |
| 8 | Brainerd | 1981.06.14 | GTX | Ford Mustang Turbo | Team Zakspeed Roush | |
| 9 | Daytona | 1981.07.05 | GTX | Porsche 935 Turbo |  DeNarvaez Enterprises | |
| 10 | Sears Point | 1981.07.26 | GTX | Ford Mustang Turbo | Team Zakspeed Roush | |
| 11 | Portland | 1981.08.02 | GTX | Lola T600 - Chevrolet | Kent-Cooke/Wood Racing | |
| 12 |  Mosport Park | 1981.08.16 | GTX | Porsche 935 Turbo | Andial Meister Racing | |
| 13 | Road America | 1981.08.23 | GTX | Porsche 935 Turbo | Andial Meister Racing | |
| 14 | Road Atlanta | 1981.09.13 | GTX | Lola T600 - Chevrolet | Kent-Cooke/Woods Racing | |
| 15 | Pocono | 1981.09.27 | GTX | Porsche 935 Turbo | JLP Racing | |
| 16 | Daytona | 1981.11.29 | GTX | Porsche 935 Turbo | JLP Racing |