The 2004 Petit Le Mans was the eighth race for the 2004 American Le Mans Series season and held at Road Atlanta. It took place on September 25, 2004.
Class winners in bold. Cars failing to complete 70% of winner's distance marked as Not Classified (NC).
| Pos | Class | No | Team | Drivers | Chassis | Tyre | Laps | |
|---|---|---|---|---|---|---|---|---|
| Engine | ||||||||
| 1 | LMP1 | 38 |  ADT Champion Racing |  Marco Werner JJ Lehto | Audi R8 | 394 | ||
| Audi 3.6 L Turbo V8 | ||||||||
| 2 | LMP1 | 2 | ADT Champion Racing |  Johnny Herbert Pierre Kaffer | Audi R8 | 391 | ||
| Audi 3.6 L Turbo V8 | ||||||||
| 3 | LMP1 | 20 | Dyson Racing | Chris Dyson Jan Lammers | MG-Lola EX257 | 383 | ||
| MG (AER) XP20 2.0 L Turbo I4 | ||||||||
| 4 | GTS | 4 | Corvette Racing | Oliver Gavin Olivier BerettaJan Magnussen | Chevrolet Corvette C5-R | 376 | ||
| Chevrolet LS7R 7.0 L V8 | ||||||||
| 5 | GTS | 3 | Corvette Racing |  Ron Fellows Johnny O'Connell Max Papis | Chevrolet Corvette C5-R | 375 | ||
| Chevrolet LS7R 7.0 L V8 | ||||||||
| 6 | LMP2 | 30 | Intersport Racing Citgo Racing | Clint Field Robin Liddell Milka Duno | Lola B2K/40 | 369 | ||
| Judd KV675 3.4 L V8 | ||||||||
| 7 | GT | 23 | Alex Job Racing | Jörg Bergmeister Timo Bernhard Sascha Maassen | Porsche 911 GT3-RSR | 360 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 8 | GT | 24 | Alex Job Racing | Marc Lieb Romain Dumas Wolf Henzler | Porsche 911 GT3-RSR | 360 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 9 | LMP1 | 16 | Dyson Racing | Butch Leitzinger James Weaver Andy Wallace | MG-Lola EX257 | 357 | ||
| MG (AER) XP20 2.0 L Turbo I4 | ||||||||
| 10 | GT | 31 | White Lightning Racing | David Murry Craig Stanton | Porsche 911 GT3-RSR | 357 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 11 | GT | 35 | Risi Competizione | Anthony Lazzaro Ralf Kelleners Fabrizio de Simone | Ferrari 360 Modena GTC | 355 | ||
| Ferrari 3.6 L V8 | ||||||||
| 12 | GT | 45 | Flying Lizard Motorsports | Johannes van Overbeek Darren Law Patrick Huisman | Porsche 911 GT3-RSR | 353 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 13 | GT | 43 | BAM | Leo Hindery Lucas Luhr Adam Jones | Porsche 911 GT3-RSR | 351 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 14 | GT | 66 | New Century - The Racer's Group | Patrick Long Cort Wagner Mike Rockenfeller | Porsche 911 GT3-RSR | 350 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 15 | GT | 79 | J-3 Racing | Justin Jackson Tim Sugden Xavier Pompidou | Porsche 911 GT3-RSR | 350 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 16 | GT | 67 | New Century - The Racer's Group | Philip Collin Pierre Ehret Robert Nearn | Porsche 911 GT3-RSR | 349 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 17 | GT | 93 | Cirtek Motorsport | Christophe Bouchut Stéphane Ortelli | Porsche 911 GT3-RSR | 348 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 18 | LMP2 | 13 | Marshall Cooke Racing | Andy Lally Spencer Pumpelly Ryan Eversley | Lola B2K/40 | 339 | ||
| Ford (Millington) 2.0 L Turbo I4 | ||||||||
| 19 | GTS | 71 | Carsport America | Tom Weickardt Jean-Philippe Belloc Fabio Babini | Dodge Viper GTS-R | 339 | ||
| Dodge 8.0 L V10 | ||||||||
| 20 | GTS | 63 | ACEMCO Motorsports | Terry Borcheller Johnny Mowlem João Barbosa | Saleen S7-R | 337 | ||
| Ford 7.0 L V8 | ||||||||
| 21 DNF | GTS | 6 | Krohn-Barbour Racing | Tracy Krohn Joe Fox Scott Maxwell | Lamborghini Murciélago R-GT | 313 | ||
| Lamborghini 6.0 L V12 | ||||||||
| 22 DNF | GT | 8 | Foxhill Racing Comprent Motor Sports | Andrew Davis Michael Cawley Charles Espenlaub | Porsche 911 GT3-RS | 306 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 23 | GT | 44 | Flying Lizard Motorsports | Lonnie Pechnik Seth Neiman Jon Fogarty | Porsche 911 GT3-RSR | 284 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 24 NC | GT | 50 | Panoz Motor Sports | Gunnar Jeannette Marino Franchitti Christophe Tinseau | Panoz Esperante GT-LM | 264 | ||
| Ford (Élan) 5.0 L V8 | ||||||||
| 25 DNF | LMP2 | 56 | Miracle Motorsports Team Bucknum Racing | Jeff Bucknum Chris McMurry Bryan Willman | Lola B2K/40 | 209 | ||
| Nissan (AER) VQL 3.0 L V6 | ||||||||
| 26 DNF | GTS | 5 | Krohn-Barbour Racing | Peter Kox David Brabham Niclas Jönsson | Lamborghini Murciélago R-GT | 184 | ||
| Lamborghini 6.0 L V12 | ||||||||
| 27 DNF | LMP1 | 27 | Creation Autosportif | Jamie Campbell-Walter Nicolas Minassian | DBA 03S | 130 | ||
| Zytek ZG348 3.4 L V8 | ||||||||
| 28 DNF | LMP2 | 10 | Miracle Motorsports | Ian James John Macaluso James Gue | Courage C65 | 128 | ||
| MG (AER) XP20 2.0 L Turbo I4 | ||||||||
| 29 DNF | GT | 60 | P.K. Sport | Liz Halliday Piers Masarati Ian Donaldson | Porsche 911 GT3-RS | 127 | ||
| Porsche 3.6 L Flat-6 | ||||||||
| 30 DNF | LMP1 | 37 | Intersport Racing | Jon Field Duncan Dayton Mike Durand | Lola B01/60 | 120 | ||
| Judd KV675 3.4 L V8 | ||||||||
| 31 DNF | LMP2 | 19 | Van der Steur Racing | Gunnar van der Steur Eric van der Steur Ben Devlin | Lola B2K/40 | 107 | ||
| Nissan (AER) VQL 3.0 L V6 | ||||||||
| 32 DNF | GT | 92 | Cirtek Motorsport | Andrea Montermini Frank Mountain Rob Wilson | Ferrari 360 Modena GTC | 64 | ||
| Ferrari 3.6 L V8 | ||||||||
| 33 DNF | LMP1 | 12 | Autocon Motorsports | Michael Lewis Tomy Drissi Melanie Paterson | Riley & Scott Mk III C | 12 | ||
| Élan 5.0 L V8 | ||||||||
| 34 DNF | GT | 78 | J-3 Racing Hyper Sport Competition | Manuel Matos Randy Wars Rick Skelton | Porsche 911 GT3-RS | 11 | ||
| Porsche 3.6 L Flat-6 |