| 5.1.2004 | Daytona Test | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Earle / Assentato / Longhi | Scuderia Ferrari of Washington | 45th |
| 1.2.2004 | 24 h Daytona | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | de Simone / Earle / Assentato / Longhi | Scuderia Ferrari of Washington | 37th |
| 28.2.2004 | 250 mile Homestead | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Earle / Assentato | Scuderia Ferrari of Washington | 22nd |
| 10.4.2004 | 250 mile Phoenix | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Barbosa / Assentato / Earle | Scuderia Ferrari of Washington | 34th |
| 23.5.2004 | 6 h Mont-Tremblant | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Barbosa / Assentato / Earle | Scuderia Ferrari of Washington | 16th |
| 20.6.2004 | 6 h Watkins Glen | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Barbosa / Assentato / Earle | Scuderia Ferrari of Washington | 22nd |
| 1.7.2004 | 250 mile Daytona | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Earle / Assentato | Scuderia Ferrari of Washington | 21st |
| 7.8.2004 | 250 mile Mid-Ohio | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Assentato / Barbosa / Earle | Scuderia Ferrari of Washington | 18th |
| 13.8.2004 | 200 mile Watkins Glen | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Earle / Assentato | Scuderia Ferrari of Washington | 27th |
| 19.9.2004 | 250 mile Homestead II | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Assentato / Earle | Scuderia Ferrari of Washington | 24th |
| 3.10.2004 | 400 km Virginia | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Barbosa / Assentato / Earle | Scuderia Ferrari of Washington | 12th |
| 10.10.2004 | 250 mile Barber | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Barbosa / Assentato / Earle | Scuderia Ferrari of Washington | 30th |
| 31.10.2004 | 400 km Fontana | 33 | Maserati Trofeo Light #ZAMBC38B 000008937 (MTL01) (Italtechnica) | Assentato / Earle | Scuderia Ferrari of Washington | 16th |