| 01 | Riley Mk XI Lexus | CompUSA Chip Ganassi with Felix Sabates | white/red | COMP USA | Goodyear | | closed | mid |
| 02 | Riley Mk XI Lexus | CompUSA Chip Ganassi with Felix Sabates | white/red | COMP USA | Goodyear | | closed | mid |
| 04 | Porsche 996 GT3 Cup | Grease Monkey Racing | white (+red/orange) | SIRIUS | Hoosier | Motul | closed | rear |
| 06 | Chevrolet Corvette | ICY/SL Motorsports | yellow | revolution | Dunlop | | closed | front |
| 09 | Crawford DP03 Pontiac | Spirit of Daytona Racing | orange (+black) | SPIRALZ/SPIRIT of DAYTONA | Goodyear | | closed | mid |
| 2 | Crawford DP03 Pontiac | CITGO - Howard - Boss Motorsports | red/blue | CITGO | Goodyear | | closed | mid |
| 4 | Crawford DP03 Pontiac | Howard - Boss Motorsports | white/red/black | BOSS | Goodyear | Red Line Oil | closed | mid |
| 5 | Multimatic MDP1 Ford Focus | Essex Racing | silver/white (+blue) | Ford | Goodyear | | closed | mid |
| 6 | Doran JE4 Lexus | Michael Shank Racing | white/blue (+red) | VENTURA Travel SERVICE | Goodyear | | closed | mid |
| 7 | Fabcar FDSC/03 BMW | Southard Motorsports | white (+blue/red) | BMW FABCAR | Goodyear | | closed | mid |
| 10 | Riley Mk XI Pontiac | SunTrust Racing | black (+yellow) | SUNTRUST | Goodyear | | closed | mid |
| 14 | Porsche 996 GT3 Cup | Autometrics Motorsports | white/blue | Autometrics MOTORSPORTS/Trailex | Hoosier | | closed | rear |
| 16 | BMW M3 E46 | Prototype Technology Group | red/black | PERFORMANCE FRICTION BRAKES | Dunlop | Castrol | closed | front |
| 18 | Chase CCE-001 Chevrolet | Chase Competition Engineering | red (+yellow/blue) | CHASE/HAYES | Goodyear | | closed | mid |
| 21 | BMW M3 E46 | Prototype Technology Group | white/black/red | BMW Financial Services/PERFORMANCE FRICTION BRAKES | Dunlop | Castrol | closed | front |
| 22 | BMW M3 E46 | Prototype Technology Group | white/black/red | BMW Financial Services/PERFORMANCE FRICTION BRAKES | Dunlop | Castrol | closed | front |
| 23 | Pontiac GTO | Horizon Motorsports LLC | yellow/blue | | Dunlop | | closed | front |
| 26 | Porsche 996 GT3 Cup | Hoist Lift | white (+blue) | | Hoosier | | closed | rear |
| 27 | Doran JE4 Lexus | Doran Lista Racing | red (+blue) | LISTA | Goodyear | | closed | mid |
| 33 | Maserati Trofeo Light | Scuderia Ferrari of Washington | blue | MASERATI Of Washington | Dunlop | | closed | front |
| 34 | Maserati Trofeo Light | Scuderia Ferrari of Washington | white (+yellow/black) | Putman Leasing | Dunlop | | closed | front |
| 36 | Porsche 996 GT3 Cup | TPC Racing | white (+green/red) | Ajilon/TURBO Performance/TPC SUPERCHARGERS | Hoosier | | closed | rear |
| 37 | Porsche 996 GT3 Cup | TPC Racing | white (+green/red) | Ajilon/TURBO Performance/TPC SUPERCHARGERS | Hoosier | | closed | rear |
| 38 | Porsche 996 GT3 Cup | TPC Racing | white (+green/red) | Ajilon/TURBO Performance/TPC SUPERCHARGERS | Hoosier | | closed | rear |
| 39 | Crawford DP03 Pontiac | The Spark of Georgia Tech | yellow (+white) | Georgia Institute of Technology | Goodyear | | closed | mid |
| 41 | Porsche 996 GT3 Cup | Orison-Planet Earth Motorsports | blue/green (+black) | ORISON/Gojo/SPEEDSOURCE | Hoosier | Red Line Oil | closed | rear |
| 42 | Porsche 996 GT3 Cup | Orison-Planet Earth Motorsports | blue/green (+black) | ORISON/Gojo/SPEEDSOURCE | Hoosier | | closed | rear |
| 46 | Chevrolet Corvette Z06 | Michael Baughman Racing | white (+blue/red) | | Hoosier | | closed | front |
| 47 | Porsche 996 GT3 Cup | Michael Baughman Racing | yellow (+blue/yellow/green) | WSi, Waste Service Inc. | Hoosier | | closed | rear |
| 54 | Doran JE4 Pontiac | Kodak - Bell Motorsports | white (+yellow/black) | Kodak/EasyShare | Goodyear | | closed | mid |
| 57 | Porsche 996 GT3-R | Stevenson Motorsports/Auto Assets | white (+blue/red) | STEVENSON GROUP | Dunlop | | closed | rear |
| 58 | Fabcar FDSC/03 Porsche | Red Bull - Brumos - Goodyear - Kendall | dark blue (+yellow/red) | Red Bull/Brumos Porsche | Goodyear | | closed | mid |
| 59 | Fabcar FDSC/03 Porsche | Brumos - Goodyear - Kendall | white (+red/blue) | Brumos Porsche | Goodyear | Kendall | closed | mid |
| 66 | Porsche 996 GT3-RS | The Racers Group | blue (+yellow) | RACER'S GROUP/MONSTER CABLE/Gleason | Dunlop | | closed | rear |
| 67 | Porsche 996 GT3-RS | The Racers Group | blue (+yellow) | RACER'S GROUP/MONSTER CABLE | Dunlop | | closed | rear |
| 73 | Porsche 996 GT3 Cup | Baldwin-Tafel Racing | white (+red) | ALCHEMY | Hoosier | | closed | rear |
| 77 | Porsche 996 GT3-RS | G&W Motorsports | white/black (+red) | NETTTS | Dunlop | | closed | rear |
| 80 | Picchio DP2 BMW | G&W Motorsports | white (+orange) | G&W | Goodyear | | closed | mid |
| 81 | Doran JE4 BMW | Rx.com/G&W Motorsports | white/dark blue (+red) | Rx.com | Goodyear | | closed | mid |
| 86 | Porsche 996 GT3 Cup | G&W Motorsports | silver/blue (+red) | PIPESERVICESTT.COM | Hoosier | | closed | rear |