| 0 | Porsche 911 GT1 Evo | Bytzek Motorsports | silver | GAETA | Goodyear | Elf | closed | rear |
| 00 | Porsche 911 GT1 Evo | Bytzek Motorsports | white/orange | Litens | Goodyear | Elf | closed | rear |
| 03 | Marcos Mantis Plus | Marcos Racing International USA | orange/green/blue | Visit Sri Lanka | Dunlop | | closed | front |
| 04 | Marcos Mantis Plus | Marcos Racing International USA | white/orange | bmv/EPG | Dunlop | | closed | front |
| 05 | Pilbeam MP84 Nissan | Team Bucknum Racing | gold (+purple) | Flamingo | Dunlop | | open | mid |
| 06 | Riley & Scott Mk III Ford | Jacobs Motorsports | yellow | Budweiser | Goodyear | | open | mid |
| 07 | Picchio D-USA BMW | G&W Motorsports | yellow | USI/MOMENTUM | Dunlop | | open | mid |
| 08 | Marcos Mantara LM600 | Marcos Racing International | red/green/blue (+yellow) | Memec/OCEANIC/ALEXANDER MAXIMA | Goodyear | | closed | front |
| 09 | Chevrolet Corvette | Flis Motorsports | silver | Microflex/Wendy's | Goodyear | | closed | front |
| 2 | Crawford SSC2K Judd | Crawford Racing | silver/blue | WORLDCOM/CRAWFORD | Goodyear | | open | mid |
| 3 | Jaguar XKR | Rocketsports Racing | black | JOHNSON CONTROLS/Futaba | Goodyear | | closed | front |
| 4 | Dodge Viper GTS-R | Brookspeed Racing | white | RED BULL | Goodyear | | closed | front |
| 7 | Porsche 996 GT3-R 3.8 | RWS Motorsport | blue (+yellow/red) | Red Bull | Goodyear | | closed | rear |
| 8 | Lola B2K/40 Nissan | Rand Racing/Risi Competizione | silver (+red/dark blue) | MAKE A WISH | Dunlop | | open | mid |
| 9 | Porsche 996 GT3-R | RWS Motorsport | blue (+yellow/red) | Red Bull/FELBERMAYR | Dunlop | | closed | rear |
| 10 | BMW M3 E46 | Genesis | white/blue | TRADITION | Dunlop | | closed | front |
| 12 | Ultima GTR | K&N Filters Racing | orange/black | K&N | Goodyear | | closed | mid |
| 13 | Ferrari 333 SP | Risi Competizione | red (+black) | SEITEL | Goodyear | | open | mid |
| 16 | Riley & Scott Mk III Ford | Dyson Racing Team | white/blue | THETFORD/NORCOLD/GOODYEAR | Goodyear | 76 | open | mid |
| 18 | Mosler MT900R | Boston Motorsports Group | silver | DRY TRONIC/MUELLER BAISDEN/Majestic | Dunlop | | closed | mid |
| 19 | Chevrolet Corvette | ACP Motorsports | dark blue/white (+red) | Budweiser | Goodyear | | closed | front |
| 20 | Riley & Scott Mk III Ford | Dyson Racing Team | white/black | THETFORD/NORCOLD/GOODYEAR | Goodyear | 76 | open | mid |
| 21 | Lola B2K/40 Nissan | Archangel Motorsport Services | red/black/white | CIRTEK | Dunlop | | open | mid |
| 22 | Lola B2K/40 Nissan | Archangel Motorsport Services | black/white/blue | Gestetner | Dunlop | | open | mid |
| 23 | Ascari KZR-1 BMW | Team Ascari | silver | NDS | Goodyear | | open | mid |
| 24 | Mosler MT900R | Perspective Racing | orange/black | PARISHOTELS.COM | Dunlop | | closed | mid |
| 27 | Dallara LMP Judd | Doran Lista Racing | red/white (+blue) | LISTA | Goodyear | | open | mid |
| 29 | Ford Mustang | Sky Blue Racing | white | USA/BBS | Goodyear | | closed | front |
| 30 | Lola B2K/10 Judd | Intersport Racing | blue/red (+silver) | Banana Joe's | Goodyear | | open | mid |
| 31 | Saleen S7-R | Konrad Motorsport | white/turquoise | NOTTER | Goodyear | | closed | mid |
| 33 | Ferrari 360 Modena N-GT | Scuderia Ferrari of Washington | red | BBS/WILTON PARTNERS | Dunlop | | closed | mid |
| 34 | Porsche 996 GT3-RS | ZIP Racing | white/blue | WeatherTech | Dunlop | | closed | rear |
| 35 | Porsche 996 GT3-R | ZIP Racing | blue/white | Windows Media | Dunlop | | closed | rear |
| 36 | Riley & Scott Mk III C Elan | Jim Matthews Racing | white | JMR | Goodyear | 76 | open | mid |
| 37 | Lola B2K/10B Judd | Intersport Racing | blue/red (+silver) | Banana Joe's | Goodyear | | open | mid |
| 38 | Lola B2K/10 Porsche | Champion Racing | white (+blue/red) | Champion | Goodyear | | open | mid |
| 39 | Porsche 996 GT3-R | Autosport Race Team | white (+blue) | Watch Paradise.com | Dunlop | | closed | rear |
| 40 | BMW M3 E46 | Alegra Motorsports/901 Shop | white/blue/red | Greased Lightning | Dunlop | | closed | front |
| 42 | Porsche 996 GT3-RS | Team Greeneman | red (+blue) | Valvoline | Goodyear | Valvoline | closed | rear |
| 43 | Porsche 996 GT3-RS | Orbit Racing | white/silver/red (+black) | YES NETWORK/HL CAPITAL | Dunlop | | closed | rear |
| 44 | Porsche 996 GT3-RS | Orbit Racing | yellow | BRAMAN/CigarCigar.com | Dunlop | | closed | rear |
| 45 | Dodge Viper GTS-R | American Viper Racing | white/blue | uniessemarine/ESP | Goodyear | Motorex | closed | front |
| 46 | Chevrolet Corvette | Morgan Dollar Motorsports | white/black (+green/blue) | ca Computer Associates | Goodyear | | closed | front |
| 49 | Ascari KZR-1 Judd | Team Ascari | silver (+violet/black) | NDS | Goodyear | | open | mid |
| 50 | BMW M3 E46 | Aasco/Boduck Racing | silver | EMC/TKC | Dunlop | | closed | front |
| 51 | Saleen S7-R | Park Place Racing/Team Seattle | black/white (+blue) | Florida Recycling Services/Childern's | Goodyear | | closed | mid |
| 53 | Saleen S7-R | Park Place Racing/Team Seattle | white | carpoint/Children's/West Family Foundation | Goodyear | | closed | mid |
| 54 | BMW M3 E46 | Bell Motorsports | blue/silver | ACUVUE | Dunlop | | closed | front |
| 55 | Chevrolet Camaro | Dewey Motorsports | red | Budweiser | Goodyear | | closed | front |
| 56 | Porsche 996 GT3-RS | Seikel Motorsport | black/yellow | ROSA & C./SEIKEL/roseisland.it | Dunlop | | closed | rear |
| 57 | Porsche 996 GT3-RS | Seikel Motorsport | white/black | TDM | Dunlop | | closed | rear |
| 60 | Chevrolet Corvette | Xtreme Racing Group | white/black | erniesV8.com | Goodyear | | closed | front |
| 62 | Kudzu DLM/FW Mazda | Team Spencer Motorsports | orange/white/blue | CROCOTILE/mazda | Dunlop | | open | mid |
| 63 | Kudzu DLY Mazda | Downing Atlanta | green | hans | Goodyear | | open | mid |
| 66 | Porsche 996 GT3-RS | The Racers Group | blue | RACER'S GROUP/MONSTER CABLE/SUNCOAST PORSCHE/INICHIP | Dunlop | | closed | rear |
| 67 | Porsche 996 GT3-RS | The Racers Group | blue | RACER'S GROUP/MONSTER CABLE/SUNCOAST PORSCHE/INICHIP | Dunlop | | closed | rear |
| 68 | Porsche 996 GT3-R | The Racers Group | blue | RACER'S GROUP/MONSTER CABLE/SUNCOAST PORSCHE/INICHIP | Dunlop | | closed | rear |
| 71 | Chevrolet Corvette | ACP Motorsports | white (+red) | | Goodyear | | closed | front |
| 72 | Porsche 996 GT3 Cup | Jack Lewis Enterprises | silver/red | MYRTLETECH | Dunlop | | closed | rear |
| 73 | Porsche 996 GT3-R | Team Eurotech | silver/black | PARAGON/John Guest | Dunlop | | closed | rear |
| 74 | Riley & Scott Mk III C Judd | Robinson Racing | red/blue | 74 RANCH RESORT | Goodyear | | open | mid |
| 77 | Dodge Viper GTS-R | Larbre Competition | white/black/blue/red | THERMO KING | Goodyear | | closed | front |
| 78 | Norma M2000-01 Ford | Sezio Florida Racing Team | blue/white | COMPOSITE RESOURCES | Goodyear | | open | mid |
| 79 | Porsche 996 GT3-RS | J3 Racing | white/violet | Brumos Porsche | Dunlop | | closed | rear |
| 82 | Chevrolet Corvette | Dick Greer Racing - Wendy's | black (+yellow/red) | WENDY'S | Goodyear | | closed | front |
| 83 | Saleen S7-R | Graham Nash Motorsport | black | FlightVu | Goodyear | | closed | mid |
| 84 | Porsche 996 GT3-R | Graham Nash Motorsport | red | FlightVu | Dunlop | | closed | rear |
| 85 | Porsche 996 GT3-RS | Freisinger Motorsport | white (+red) | INOVALIS | Dunlop | | closed | rear |
| 86 | Porsche 996 GT3-RS | Freisinger Motorsport | white | Bank von Ernst | Dunlop | | closed | rear |
| 87 | Norma M2000-02 Ford | Sezio Florida Racing Team | blue/white | EMR | Goodyear | | open | mid |
| 89 | Lola B2K/40 Nissan | Porschehaus Racing | blue/white | KOLTER/Case | Dunlop | | open | mid |
| 90 | Chevrolet Corvette | Flis Motorsports | silver | REIMAX | Goodyear | Red Line Oil | closed | front |
| 91 | Oldsmobile Aurora | Paladin Racing | red/yellow | Paladin | Goodyear | | closed | front |
| 92 | Porsche 996 GT3-R | Swiss GT Racing | red (+white) | WILTON PARTNERS | Dunlop | | closed | rear |
| 93 | Ferrari F355 | Mastercar SRL | red | GLEO | Dunlop | | closed | mid |
| 95 | Riley & Scott Mk III Chevrolet | TRV Motorsport | yellow/black | RED LINE OIL/SUPREME | Goodyear | | open | mid |
| 96 | Ferrari 360 GT | Mastercar SRL | red | GLEO/FRIENDS | Dunlop | | closed | mid |
| 98 | Porsche 996 GT3-R | MAC Racing | white (+yellow) | VERDO | Dunlop | | closed | rear |
| 99 | Porsche 996 GT3-R | Cirtek Motorsport | dark blue/silver | CARLISLE | Dunlop | | closed | rear |