| 00 | Ferrari 333 SP 98 | Autosport Racing | yellow | | Pirelli | | open | mid |
| 01 | Porsche 996 GT3-R | Reiser Callas Rennsport | white (+red/blue) | R | Yokohama | | closed | rear |
| 03 | Porsche 911 GT2 | Roock Racing | silver (+blue) | auto motor sport | Yokohama | | closed | rear |
| 04 | Porsche 911 GT2 | Roock Racing | silver (+blue) | NAVISION/Men's Fitness | Yokohama | | closed | rear |
| 06 | Lola B98/10 Ford | Multimatic Motorsports | silver | www.quikblade.com | Pirelli | | open | mid |
| 07 | Porsche 911 Carrera RSR | G&W Motorsports | light blue (+red/yellow/green/blue) | thejeniferfund.org | Pirelli | | closed | rear |
| 09 | Chevrolet Camaro | The Spirit of Daytona | white | CAT COUNTRY 107.5/X1-R | Pirelli | | closed | front |
| 2 | Porsche 996 GT3-R | MCR/Aspen Knolls | white/blue (+red) | ASPEN KNOLL'S/PIRELLI | Pirelli | | closed | rear |
| 3 | Chevrolet Corvette C5-R | Corvette Racing | yellow/white (+black) | Goodwrench/GMAC | Goodyear | | closed | front |
| 4 | Chevrolet Corvette C5-R | Corvette Racing | yellow/white (+black) | Goodwrench/GMAC | Goodyear | | closed | front |
| 5 | Cadillac Northstar LMP | Team Cadillac | silver | TOSHIBA | Pirelli | | open | mid |
| 6 | Cadillac Northstar LMP | Team Cadillac | silver | TOSHIBA | Pirelli | | open | mid |
| 7 | Porsche 996 GT3-R | RWS Motorsport | blue (+yellow/red) | Red Bull/KTM | Michelin | Castrol | closed | rear |
| 8 | Riley & Scott Mk III Ford | Philip Creighton Motorsport Ltd | yellow/violet/blue/black | | Goodyear | | open | mid |
| 9 | Spice HC94 Chevrolet | Bobby Brown Motorsports | black/red/yellow | PST COMPANY/HOTLAP | Pirelli | | open | mid |
| 10 | Porsche 996 GT3-R | Jurgen/Alzen Motorsport | white (+purple) | H&R/HORROHR/RS TUNING | Pirelli | | closed | rear |
| 12 | Ferrari 333 SP 98 | Risi Competizione | red | Enron/Risi Competizione | Pirelli | | open | mid |
| 13 | Chevrolet Camaro | DM Motorsports | silver (+black) | PRESTIGE | Goodyear | | closed | front |
| 14 | Chevrolet Corvette C5 | Jack Cauley Chevrolet | red (+white/black) | Mobil 1/Jack Cauley | Pirelli | Mobil 1 | closed | front |
| 15 | Chevrolet Corvette | Kreider Motorsports | white | In Car/ACERTUBO/PIAA | Goodyear | | closed | front |
| 17 | Riley & Scott Mk III Ford | Hybrid Motorsports | red (+silver) | AVE/YOKOHAMA | Yokohama | | open | mid |
| 20 | Riley & Scott Mk III Lincoln | Dyson Racing Team | white/blue | THETFORD/NORCOLD/GOODYEAR | Goodyear | | open | mid |
| 21 | Porsche 911 Carrera RSR | Aasco Performance | white | altavista | Yokohama | | closed | rear |
| 22 | Porsche 996 GT3-R | SMS Seikel Motor Sport | white/black | TDM | Dunlop | | closed | rear |
| 23 | Porsche 996 GT3-R | Alex Job Racing | white (+blue/red) | CRANIUM | Michelin | | closed | rear |
| 24 | Mazda RX-7 | Goldin Brothers Racing | silver (+orange) | mazda/SAS RACING/Hoosier | Hoosier/Goodyear | | closed | front |
| 25 | Porsche 944 Turbo | Broadfoot/Press Racing | | | Dunlop | | - | front |
| 26 | Porsche 944 Turbo | Broadfoot/Press Racing | | | Dunlop | | - | front |
| 27 | Ferrari 333 SP 98 | Doran Enterprises Inc. | red (+blue) | LISTA/AVE | Michelin | | open | mid |
| 28 | Ferrari F355 | Yellow Magic | red/yellow | | Yokohama | | closed | mid |
| 29 | Riley & Scott Mk III Ford | Intersport Racing | blue/red (+white) | Banana Joe's | Goodyear | | open | mid |
| 30 | Porsche 911 GT2 Evo | Jacobs Motorsport | | | Pirelli | | closed | rear |
| 31 | Lola B98/10 Ford | Konrad Motorsport | green/dark blue/yellow | MGM GRAND | Dunlop | | open | mid |
| 32 | Porsche 911 GT2 | Konrad Motorsport | dark green (+black/yellow) | MGM GRAND/KLÖBER | Dunlop | | closed | rear |
| 33 | Porsche 996 GT3-R | MAC Racing | white | SEVEN | Pirelli | | closed | rear |
| 34 | Porsche 911 Carrera RSR | Autohaus Harrisburg Inc. | white | NAMG | Goodyear | | closed | rear |
| 35 | Ferrari F355 | Franco Scapini Motorsport | black | ATCON/SUPERTECH | Pirelli | | closed | mid |
| 36 | Reynard 2KQ Judd | Johansson Matthews Racing | white/red | h3watch.com | Yokohama | | open | mid |
| 37 | Lola B98/10 Ford | Intersport Racing | blue/red (+white) | Banana Joe's | Goodyear | | open | mid |
| 38 | Porsche 911 GT2 | Proton Competition | black/red | FELBERMAYR/ADLER-BRÄU.MOOSBEUREN | Yokohama | | closed | rear |
| 40 | Chevrolet Camaro | Rankin Racing | white (+green/black) | Hewitt financial/RACER PARTS WHOLESALE/Foyil | Goodyear | | closed | front |
| 41 | Porsche 996 GT3-R | L. R. Organisation | white/orange (+black) | L.R Organisation | Dunlop | | closed | rear |
| 42 | Pilbeam MP84 Nissan | EBRT/Schroeder Motorsport | white (+black) | Henderson Homes Property Group/golf | Dunlop | | open | mid |
| 44 | Porsche 996 GT3-R | PK Sport | white | CHAMBERS/VOYAGER/HARLOW | Dunlop | | closed | rear |
| 45 | Dodge Viper GTS-R | Team Viper West | white/blue | THOMAS GROUP | Dunlop | Castrol | closed | front |
| 46 | Dodge Viper GTS-R | Team Viper West | pink/yellow/orange/white/black | NOTTER/APOL/sportfeed.com | Dunlop | Castrol | closed | front |
| 47 | Spice SE90 Chevrolet | RaceStar Motorsports | blue | RACESTAR/FLO-TEC | Pirelli | | open | mid |
| 48 | Porsche 911 GT2 | Haberthur Racing | white | linel FILATTICE | Dunlop | Castrol | closed | rear |
| 49 | Porsche 911 GT2 | Haberthur Racing | white | THE COLLECTION | Dunlop | Castrol | closed | rear |
| 50 | BMW M3 | Genesis Racing | white (+blue) | nationalpb.com/M Power | Yokohama | | closed | front |
| 51 | Porsche 996 GT3-R | Dick Barbour Racing | silver (+dark blue/red) | Mobil 1 | Michelin | Mobil 1 | closed | rear |
| 52 | Oldsmobile Cutlass | Mark Winkelman | red/yellow | | Goodyear | | closed | front |
| 53 | Chevrolet Camaro | Diablo Racing | white (+blue/red) | | Goodyear | | closed | front |
| 54 | BMW M3 | Bell Motorsports/Yokohama Tires | white (+dark blue) | YOKOHAMA | Yokohama | | closed | front |
| 55 | BMW M3 | Genesis Racing | white/black/red | GENESIS/The Torge | Yokohama | | closed | front |
| 56 | Porsche 996 GT3-R | Haberthur Racing | black | ORSOGIL/ROSA & C. | Pirelli | | closed | rear |
| 57 | Porsche 996 GT3-R | Haberthur Racing | white | Silc/Norton | Dunlop | | closed | rear |
| 58 | Porsche 996 GT3-R | MAC Racing | white | FACI EUROPE/PVS/I.B.A./ITAS | Pirelli | | closed | rear |
| 59 | Porsche 996 GT3-R | Brumos Porsche | white (+blue/red) | Brumos Porsche/CHEREAU/NAVISION/TSW Racing | Michelin | Motorex | closed | rear |
| 60 | Kudzu DLM-4 Chevrolet | Jacobs Motorsports | white | PIRELLI/Valvoline | Pirelli | Valvoline | open | mid |
| 62 | BMW M3 | Safina Racing | white/black/red | PIRELLI | Pirelli | | closed | front |
| 63 | Kudzu DLY Mazda | Downing Atlanta Inc. | white (+green/blue) | NEC/mazda/CROCOTILE | Goodyear | | open | mid |
| 64 | Porsche 968 | Autohaus Harrisburg Inc. | blue | LANCASTER EMERGENCY ASSOCIATION, LTD | Dunlop | | - | front |
| 66 | Porsche 996 GT3-R | The Racers Group/Team Seattle Children's Hospital | white (+blue) | | Pirelli | | closed | rear |
| 67 | Porsche 996 GT3-R | The Racers Group/Westward Ho Casino | white/yellow/red | WESTWARD-HO/MPIE/RACER'S GROUP | Pirelli | | closed | rear |
| 68 | Porsche 911 Carrera RSR | The Racers Group | blue/violet | RACER'S GROUP/FIKSE | Pirelli/Goodyear | | closed | rear |
| 69 | Porsche 996 GT3-R | EMKA Racing | white (+red/yellow) | EMI/harman/kardon | Pirelli | | closed | rear |
| 70 | Porsche 996 GT3-R | Skea Racing International | white | Meguiar's | Pirelli | | closed | rear |
| 71 | Chevrolet Camaro Z28 | Dura - The Fitted Garage | | | Hoosier | | closed | front |
| 72 | Porsche 911 GT2 | Freisinger Motorsport | black/white | MOTOREX | Dunlop | Motorex | closed | rear |
| 73 | Porsche 911 GT2 | Freisinger Motorsport | black/white | LINTOTT/TONDACH/Galla | Dunlop | | closed | rear |
| 74 | Riley & Scott Mk III Chevrolet | 74 Ranch Resort | red/blue (+white) | 74 ranch.com | Goodyear | | open | mid |
| 75 | Porsche 996 GT3-R | Champion Racing Inc. | black | WHERE THE MONEY Is!/Champion | Michelin | | closed | rear |
| 78 | Norma M2000-01 Mader | Sezio Florida Racing | white (+blue) | | Pirelli | | open | mid |
| 79 | Porsche 911 GT2 | Free Spirit Motorsports | yellow/red | Hella/PORSCHE | Pirelli | | closed | rear |
| 81 | Porsche 996 GT3-R | G&W Motorsports | white (+yellow) | H&R/KAL IV/RH | Michelin | | closed | rear |
| 84 | Chevrolet Camaro | Comer Racing Inc. | white/red | PIRELLI/COMER RACING/CAROLINA SPEEDWERKS | Pirelli | | closed | front |
| 87 | Chevrolet Camaro | John Annis Racing | yellow | | Goodyear | | closed | front |
| 88 | Porsche 996 GT3-R | MCR/Nygmatech | red/white | First Manhattan Consulting Group/FAMILY CLICK.com | Pirelli | | closed | rear |
| 89 | Porsche 996 GT3-R | MCR/Nygmatech | white/red | Global Center/roku/First Manhattan Consulting Group/FAMILY CLICK.com | Pirelli | | closed | rear |
| 90 | Porsche 996 GT3-R | Larbre Compétition | white (+blue/grey) | THERMO KING/CHEREAU | Michelin | | closed | rear |
| 91 | Dodge Viper GTS-R | Viper Team Oreca | red (+white) | DODGE/Mobil 1 | Michelin | Mobil 1 | closed | front |
| 92 | Dodge Viper GTS-R | Viper Team Oreca | red (+white) | DODGE/Mobil 1 | Michelin | Mobil 1 | closed | front |
| 93 | Dodge Viper GTS-R | Viper Team Oreca | red (+white) | DODGE/Mobil 1 | Michelin | Mobil 1 | closed | front |
| 94 | Chevrolet Camaro | A General Kinetics | black/yellow | TUFFLUBE | Goodyear | | closed | front |
| 95 | Riley & Scott Mk III Chevrolet | TRV Motorsport | yellow | RACER PARTS WHOLESALE | Goodyear | | open | mid |
| 96 | Porsche 996 Supercup | Nucap | red/silver (+white) | NUCAP/KENDRICK IMPORTS/OKLAHOMA FOREIGN | Dunlop | | closed | rear |
| 97 | Porsche 993 Carrera RSR | Schmidt Brothers | black (+yellow) | Applebee's/SCHMIDT AUTO MALL | Pirelli | | closed | rear |
| 98 | Porsche 996 Supercup | Finstine Racing | dark blue/silver | McKessonHBOC | Pirelli | | closed | rear |
| 99 | Porsche 911 GT2 | Schumacher Racing | white (+violet) | | Michelin/Dunlop/Pir. | | closed | rear |