| 0 | Epps / Stanton / Slater / Hessert | Turning Point Racing (USA) | | Porsche | Boxster | 986 | Porsche | GT3 |
| 00 | Calderari / Bryner / Zadra | Autosport Racing (CH) | Enzo Calderari | Ferrari | 333 SP | | Ferrari | CA |
| 01 | Greenberg / Drew / Nelson / Peter | Greycliff Racing | Mark Greenberg | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 02 | Reiser / Mowlem / Willingham / Murry | Reiser/Callas Rennsport | | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 03 | Parker / Parker / Allen / Hanneman | NP Racing (USA) | | Dodge | Viper | GTS-R | Dodge | GT2 |
| 04 | Schmidt / Conkel / Schmidt | Schmidt Motorsports | Schmidt Brothers | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 07 | Marshall / Marshall / Law / Huisman / Tremblay | G & W Motorsports | | Porsche | 911 | | Porsche | GT3 |
| 08 | Konig / Ulrich / Chambers / Wilson | G & W Motorsports | | Porsche | 993 GT2 | | Porsche | GT2 |
| 09 | Conway / Flis / van Cleef | Spirit of Daytona | | Mitsubishi | Eclipse | | Mitsubishi | GT3 |
| 2 | Fellows / Kneifel / Paul, Jr. | Corvette Racing (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GT2 |
| 3 | Whittington / Whittington / Haywood | DLW Racing Inc. (USA) | | Riley & Scott | Mk III | | Ford | CA |
| 4 | Sharp / Pilgrim / Heinricy | Corvette Racing (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GT2 |
| 6 | Irvan / Cunningham / Quester / Simo / Said | Prototype Technology Group (USA) | | BMW | M3 | E36 | BMW | GT3 |
| 7 | Angelelli / de Radigues / Bell / Taylor | Doyle-Risi Racing (USA) | | Ferrari | 333 SP | | Ferrari | CA |
| 8 | Schubot / Camferdam | Transatlantic Racing (USA) | | Riley & Scott | Mk III | | Ford | CA |
| 9 | Kitchak / Heger | Toad Hall Motor Racing | | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 10 | Auberlen / Stuck / Van Overbeek / Cunningham / Simo | Prototype Technology Group (USA) | | BMW | M3 | E36 | BMW | GT3 |
| 11 | Goldsborough / Cafic | Genesis Racing | | Kudzu | DG-2 | WSC | Buick | CA |
| 12 | Fairbanks / Goldsborough | Genesis Racing (USA) | Rick Fairbanks | Hawk | MD3R | | Chevrolet | CA |
| 15 | Marcus Gustafson | Johnson Autosport | | Porsche | 911 | | Porsche | GT3 |
| 16 | Leitzinger / Wallace / Hayner / Weaver | Dyson Racing Team, Inc. (USA) | | Riley & Scott | Mk III | | Ford | CA |
| 17 | Halsmer / Pobst / Lewis / Mazzuoccola | T. C. Kline Racing, Inc. (USA) | T. C. Kline | BMW | M3 | E36 | BMW | GT3 |
| 18 | Friedman / Auberlen / Miller | Millenium Motorsports (USA) | | Porsche | 911 Carrera RSR | | Porsche | GT3 |
| 19 | Stewart / McIntyre | SK Group Motorsports | | Ford | Mustang Cobra | | Ford | GTT |
| 20 | Dyson / Weaver / Forbes-Robinson / Schroeder / Hayner | Dyson Racing Team, Inc. (USA) | | Riley & Scott | Mk III | | Ford | CA |
| 21 | Rosa / Rosa / Mangifesta / Zonca | Haberthur Racing (CH) | Guido Haberthur | Porsche | 993 GT2 | R | Porsche | GT2 |
| 22 | Kitch / Wolfkill / Hill / Gaughran | Alex Job Racing (USA) | | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 23 | Havens / Wagner / Collins / Lazzaro | Alex Job Racing (USA) | | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 27 | Goldin / Goldin / Finlay | Goldin Brothers Racing | | Mazda | RX-7 | | Mazda | GT3 |
| 28 | Field / Jones / Morgan | Intersport Wheel Works (USA) | | Lola | B98/10 | | Ford | CA |
| 29 | Brown / Mirro | Intersport Wheel Works (USA) | | Riley & Scott | Mk III | | Ford | CA |
| 31 | Casadei / Garbagnati / Bucci / Ciani | Haberthur Racing (CH) | Guido Haberthur | Porsche | 993 GT2 | R | Porsche | GT2 |
| 32 | Konrad / Lammers | Konrad Motorsport (D) | Franz Konrad | Lola | B98/10 | | Lotus | CA |
| 36 | Matthews / Johansson / Vasser / Papis | Doran/Matthews Racing (USA) | | Ferrari | 333 SP | | Ferrari | CA |
| 39 | Kicak / Pumpelly / Mitchum / Kimbrough | Pumpelly/Mitchum Motorsports (USA) | | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 41 | McGlynn / Balbach | Johnson Autosport | | Porsche | 911 Carrera RSR | | Porsche | GT3 |
| 44 | Nowicki / Smith | Specter Werks Sports | | Chevrolet | Corvette | | Chevrolet | GT3 |
| 45 | Neuman / Kester / Kenton / Drendel / Baron | Bell Motorsports | | BMW | M3 | | BMW | GT3 |
| 53 | Scheuren / Smith / Jones / McNaughton / Halbing III | Diablo Racing (USA) | Tom Scheuren | Chevrolet | Camaro | IV | Chevrolet | GTT |
| 54 | Drendel / Hindery / Graham / McCormick | Bell Motorsports (USA) | James Bell | BMW | M3 | E36 | BMW | GT3 |
| 57 | Kryder / Ahlgrim / Heinkélé | Kryderacing (USA) | | Nissan | 240SX | | Nissan | GT3 |
| 58 | Petersen / White / Cilli / Ruther / Miller | Petersen Motorsports | | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 60 | Wilson / Moser / Glenn | Kopf Precision Race Products (USA) | | Keiler | KII | | Ford | CA |
| 62 | Montani / Ronchi / Spencer / Treadway / Grupp | Downing/Atlanta, Inc. (USA) | | Kudzu | DLM | | Mazda | CA |
| 63 | Downing / Katz / Terada / Ronson / Grupp | Downing/Atlanta, Inc. (USA) | Jim Downing | Kudzu | DLY | | Mazda | CA |
| 65 | Buckler / Biskup / Bingham / Jurasz | The Racers Group (USA) | Kevin Buckler | Porsche | 964 Carrera | Cup | Porsche | GT3 |
| 67 | Pelke / Pelke / Takahashi / Herrerias | The Racers Group (USA) | Kevin Buckler | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 68 | Buckler / Conte / Holt / Lambert | The Racers Group (USA) | Kevin Buckler | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 70 | Euser / Buurman / Vann | Marcos Racing (NL) | | Marcos | Mantara | LM600 | Chevrolet | GT2 |
| 72 | Lienhard / Theys / Baldi / Luyendyk | Doran/Lista Racing (USA) | | Ferrari | 333 SP | | Ferrari | CA |
| 73 | Lewis / Wheeler | Jack Lewis Enterprises (USA) | Jack Lewis | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 74 | Robinson / Baldwin / Hoerr / Gooding | Robinson Racing (USA) | | Riley & Scott | Mk III | | Chevrolet | CA |
| 76 | Argetsinger / Polidori / Hill / McCaig | Team A.R.E. (USA) | Richard Raimist | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 77 | Nearn / Muenz / Burgess / Bagnall | Seikel Motorsport (D) | Peter Seikel | Porsche | 993 GT2 | | Porsche | GT2 |
| 78 | Sezionale / Boulay / van de Vyver / Roussel | SBF Racing | Sylvain Boulay | Norma | M14 | | Buick | CA |
| 82 | Ortelli / Hürtgen | Roock Racing (D) | Fabian Roock | Porsche | 993 GT2 | | Porsche | GT2 |
| 86 | Marshall / Marshall | G & W Motorsports (USA) | | Porsche | 993 Carrera | RSR | Porsche | GT3 |
| 88 | Neville / Dallenbach / Dollahite / Davies / Bundy | Dollahite Racing (USA) | | Ferrari | 333 SP | | Ferrari | CA |
| 89 | Lenain / Gregg / Wright / Borkowski / Crilly / Montgomery | Broadfoot Racing | | Porsche | 944 | Turbo | Porsche | GT3 |
| 95 | Volk / Schroeder / Debban / St. James / Valentine | TRV Motorsport | | Riley & Scott | Mk III | | Chevrolet | CA |
| 96 | Green / Bell / Brunk / Tola / Fisher | Entropy Racing | | Chevrolet | Camaro | | Chevrolet | GTT |
| 97 | Tom McGlynn | Johnson Autosport Racing | | Porsche | 911 Carrera RSR | | Porsche | GT3 |
| 98 | Coker / White | Hendrick Porsche | | Porsche | 968 | Turbo RS | Porsche | GT3 |
| 99 | Schumacher / O'Steen / Müller / Snow | Schumacher Racing (USA) | Larry Schumacher | Porsche | 993 GT2 | | Porsche | GT2 |