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Willow Springs International Raceway |
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| Class | Lap Time | Team | Car | Event Year | |
| 1 | U1 | 1:21.962 | Mumford, Provost | 2003 Viper Competition Coupe | 2003 |
| 2 | U1 | 1:24.986 | Johnson, Dalen, Morris | 2002 Radical SR3 | 2003 |
| 3 | U1 | 1:25.333 | Hayashi, Messley | 1992 Acura NSX | 2003 |
| 4 | U1 | 1:26.807 | Dalen, Johnson, Morris | 2002 Radical SR3 | 2003 |
| 5 | U2 | 1:26.825 | Smith, Arnold | 1997 BMW M3 | 2003 |
| 6 | U1 | 1:27.086 | Morris, Dalen, Johnson | 2002 Radical SR3 | 2003 |
| 7 | U2 | 1:27.577 | Mello, White | 1989 Porsche 944 Turbo | 2003 |
| 8 | U2 | 1:27.961 | Kennedy, Rhoades | 2000 Honda S2000 | 2003 |
| 9 | U2 | 1:28.993 | Mello, Hayashi, Messley | 89 Porsche 944 Turbo | 2002 |
| 10 | UAGT | 1:29.309 | Lindsey, Flaherty | 89 Ford Mustang | 2002 |
| 11 | U3 | 1:29.539 | Coffey, Lampe | 1970 Datsun 240Z | 2003 |
| 12 | U3 | 1:29.715 | Hazelton, Bradfield, Bitterman | 2000 Honda S2000 | 2003 |
| 13 | U2 | 1:29.923 | Ross, McGinn | 1997 BMW M3 | 2003 |
| 14 | U2 | 1:29.973 | Allan, Allan | 1995 Acura NSX | 2003 |
| 15 | U4 | 1:30.597 | Buzzetti, Chen | 00 Lotus Elise | 2002 |
| 1 | T1 | 1:30.111 | Mumford, Provost | 01 Dodge Viper ACR | 2002 |
| 2 | T1 | 1:30.396 | D, Wasserman | 2002 Dodge Viper GTS | 2003 |
| 3 | T1 | 1:31.407 | Bragg-Smith, Vietro | 2002 Mosler Photon | 2003 |
| 4 | T2 | 1:32.843 | Hardee, Southwell | 1991 Acura NSX | 2003 |
| 5 | T1 | 1:33.104 | D, Wasserman | 02 Dodge Viper GTS | 2002 |
| 6 | T2 | 1:33.144 | Olsen, Schmidt | 1972 Porsche 911 | 2003 |
| 7 | TAGT | 1:34.146 | Mashouf, Griggs | 94 Ford Mustang | 2002 |
| 8 | T2 | 1:34.197 | Kahangi, Beck | 01 BMW M3 | 2002 |
| 9 | T3 | 1:35.340 | Olsen, Schmidt | 73 Porsche 911 | 2002 |
| 10 | T1 | 1:35.493 | Wilson, Kryder | 1991 Chevrolet Corvette ZR1 | 2003 |
| 11 | T3 | 1:35.583 | Hayashi, Messley, Rhoades | 2001 Honda S2000 | 2003 |
| 12 | T1 | 1:35.609 | Straub, Tosi | 2002 Chevrolet Corvette Z06 | 2003 |
| 13 | T1 | 1:35.703 | Robinson, Humke | 2001 Chevrolet Corvette Z06 | 2003 |
| 14 | T1 | 1:36.030 | Wilson, Kryder | 91 Chevrolet Corvette ZR1 | 2002 |
| 15 | T2 | 1:36.234 | Hedlund, Garnier | 94 Toyota Supra Turbo | 2002 |