The 1998 Visa Sports Car Championships was the tenth and final round the 1998 FIA GT Championship season. It took place at the Laguna Seca Raceway, California, United States on October 25, 1998.
This race shared the weekend with a Professional SportsCar Racing Championship event.
Class winners are in bold. Cars failing to complete 70% of winner's distance are marked as Not Classified (NC).
| Pos | Class | No | Team | Drivers | Chassis | Tyre | Laps |
|---|---|---|---|---|---|---|---|
| Engine | |||||||
| 1 | GT1 | 2 |  AMG Mercedes | Klaus Ludwig  Ricardo Zonta | Mercedes-Benz CLK LM | B | 139 |
| Mercedes-Benz M119 6.0L V8 | |||||||
| 2 | GT1 | 1 | AMG Mercedes | Bernd Schneider  Mark Webber | Mercedes-Benz CLK LM | B | 139 |
| Mercedes-Benz M119 6.0L V8 | |||||||
| 3 | GT1 | 8 | Porsche AG | Jörg Müller Uwe Alzen | Porsche 911 GT1-98 | M | 138 |
| Porsche 3.2L Turbo Flat-6 | |||||||
| 4 | GT1 | 3 |  DAMS | Éric Bernard David Brabham | Panoz GTR-1 | M | 137 |
| Ford (Roush) 6.0L V8 | |||||||
| 5 | GT1 | 6 | Zakspeed Racing | Michael Bartels  Max Angelelli | Porsche 911 GT1-98 | P | 138 |
| Porsche 3.2L Turbo Flat-6 | |||||||
| 6 | GT1 | 11 | Team Persson Motorsport | Christophe Bouchut Bernd Mayländer | Mercedes-Benz CLK GTR | B | 135 |
| Mercedes-Benz M120 6.0L V12 | |||||||
| 7 | GT2 | 51 | Viper Team Oreca |  Olivier Beretta  Pedro Lamy | Chrysler Viper GTS-R | M | 127 |
| Chrysler 8.0L V10 | |||||||
| 8 | GT2 | 57 | Roock Racing |  Bruno Eichmann Mike Hezemans | Porsche 911 GT2 | Y | 126 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 9 | GT2 | 63 | Krauss Race Sports International | Michael Trunk Bernhard Müller | Porsche 911 GT2 | D | 123 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 10 | GT2 | 58 | Roock Sportsystem | André Ahrlé  Robert Schirle Dirk Layer | Porsche 911 GT2 | Y | 122 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 11 | GT1 | 12 | Team Persson Motorsport | Jean-Marc Gounon Marcel Tiemann | Mercedes-Benz CLK GTR | B | 121 |
| Mercedes-Benz M120 6.0L V12 | |||||||
| 12 | GT2 | 60 | Elf Haberthur Racing |  Michel Neugarten Gerd Ruch Zak Brown | Porsche 911 GT2 | G | 118 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 13 | GT2 | 80 | GP Motorsport | Daniel Dor John Young Peter Gregg | Saleen Mustang SR | ? | 118 |
| Ford 5.9L V8 | |||||||
| 14 | GT2 | 69 | Proton Competition | Gerold Ried Patrick Vuillaume | Porsche 911 GT2 | P | 65 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 15 | GT2 | 53 | Chamberlain Engineering | Ni Amorim Spencer Trenery Hans Hugenholtz | Chrysler Viper GTS-R | D | 117 |
| Chrysler 8.0L V10 | |||||||
| 16 | GT2 | 87 | Seikel Motorsport |  Tony Burgess Gerhard Marchner Manfred Jurasz | Porsche 911 GT2 | P | 113 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 17 | GT2 | 65 | Konrad Motorsport | Martin Stretton Toni Seiler | Porsche 911 GT2 | D | 105 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 18 DNF | GT2 | 81 | Freisinger Motorsport | Wolfgang Kaufmann Michel Ligonnet | Porsche 911 GT2 | ? | 84 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 19 DNF | GT2 | 61 | Elf Haberthur Racing | Bruno Lambert Mike Conte | Porsche 911 GT2 | G | 76 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 20 DNF | GT2 | 76 | Seikel Motorsport | Nigel Smith  Andrew Bagnall  Max Cohen-Olivar | Porsche 911 GT2 | P | 62 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 21 DNF | GT1 | 7 | Porsche AG | Yannick Dalmas Allan McNish | Porsche 911 GT1-98 | M | 44 |
| Porsche 3.2L Turbo Flat-6 | |||||||
| 22 DNF | GT2 | 71 | Marcos Racing International | Herman Buurman Manno Schaafsma | Marcos LM600 | D | 33 |
| Chevrolet 5.9L V8 | |||||||
| 23 DNF | GT2 | 70 | Marcos Racing International | Christian Vann Harald Becker Cor Euser | Marcos LM600 | D | 21 |
| Chevrolet 5.9L V8 | |||||||
| 24 DNF | GT2 | 62 | Stadler Motorsport | Renato Mastropietro Uwe Sick William Langhorne | Porsche 911 GT2 | P | 19 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 25 DNF | GT2 | 86 | Larbre Compétition | Jean-Luc Chéreau Jack Leconte | Porsche 911 GT2 | M | 15 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 26 DNF | GT2 | 56 | Roock Racing | Claudia Hürtgen Stéphane Ortelli | Porsche 911 GT2 | Y | 7 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| 27 DNF | GT2 | 66 | Konrad Motorsport | Jan Lammers Franz Konrad | Porsche 911 GT2 | D | 7 |
| Porsche 3.6L Turbo Flat-6 | |||||||
| DNS | GT2 | 52 | Viper Team Oreca | Karl Wendlinger David Donohue | Chrysler Viper GTS-R | M | – |
| Chrysler 8.0L V10 | |||||||
| DNS | GT2 | 55 | Saleen-Allen Speedlab | Andy Pilgrim Ron Johnson Terry Borcheller | Saleen Mustang SR | ? | – |
| Ford 5.9L V8 |
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