The 2004 Menards IRL Infiniti Pro Series Season was the series' third. It consisted of 12 races and the champion was Thiago Medeiros. All teams used Dallara chassis and Infiniti engines.
Note:
Race 4 no qualifying held due to rain, starting grid depend on free practice.
The Homestead-Miami 100 was held February 29 at Homestead-Miami Speedway. Paul Dana won the pole.
Top 5 Results
The Phoenix 100 was held March 20 at Phoenix International Raceway. Thiago Medeiros won the pole.
Top 5 Results
The Futaba Freedom 100 was held May 22 at the Indianapolis Motor Speedway. Thiago Medeiros won the pole.
Top 5 Results
The Aventis Racing for Kids 100 was held July 3 at Kansas Speedway. Thiago Medeiros won the pole.
Top 5 Results
The Cleanevent 100 was held July 17 at Nashville Superspeedway. Thiago Medeiros won the pole.
Top 5 Results
The Milwaukee 100 was held July 25 at the Milwaukee Mile. Thiago Medeiros won the pole.
Top 5 Results
The Paramount Health Insurance 100 was held August 1 at Michigan International Speedway. Alfred Unser won the pole.
Top 5 Results
Leonardo Maia finished fifth, but set down to seventh place due to technical infringement.