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1998 Calendar
- Homestead-Miami Speedway
U.S.A.
Round 1- 1st
Naoki Hattori - 2nd
Cristiano da Matta - 3rd
Guy Smith
- Streets of Long Beach
U.S.A.
Round 2- 1stCristiano da Matta
- 2ndGeoff Boss
- 3rdNaoki Hattori
- Nazareth Speedway
U.S.A.
Round 3- 1stCristiano da Matta
- 2ndDidier André
- 3rd
Casey Mears
- Gateway Motorsports Park
U.S.A.
Round 4- 1stShigeaki Hattori
- 2ndPhilipp Peter
- 3rdCristiano da Matta
- Milwaukee Mile
U.S.A.
Round 5- 1stDerek Higgins
- 2ndFelipe Giaffone
- 3rdSergio Paese
- The Raceway at Belle Isle Park
U.S.A.
Round 6- 1stAirton Daré
- 2ndCristiano da Matta
- 3rdGeoff Boss
- Portland International Raceway
U.S.A.
Round 7- 1stGuy Smith
- 2ndFelipe Giaffone
- 3rdLuiz Garcia Jr.
- Cleveland
U.S.A.
Round 8- 1stLuiz Garcia Jr.
- 2ndDerek Higgins
- 3rdDidier André
- Exhibition Place
Canada
Round 9- 1stGuy Smith
- 2ndNaoki Hattori
- 3rdChris Simmons
- Michigan International Speedway
U.S.A.
Round 10- 1stTony Renna
- 2ndCristiano da Matta
- 3rdSergio Paese
- Circuit Trois-Rivières
Canada
Round 11- 1stCristiano da Matta
- 2nd
Oriol Servià - 3rdNaoki Hattori
- Laguna Seca
U.S.A.
Round 13- 1stDidier André
- 2ndOriol Servià
- 3rdDerek Higgins
- Fontana Auto Club Speedway
U.S.A.
Round 14- 1stMark Hotchkis
- 2ndFelipe Giaffone
- 3rdTony Renna