2004 Tranzam Sports Sedan Series
The 2004 Tranzam Sports Sedan Series was an Australian motor racing competition open to Sports Sedans and Trans Am type cars. The series was administered by the National Australian Sports Sedan Association and was sanctioned by CAMS as a National Series. Held as the first Tranzam Sports Sedan Series following the discontinuation of the Australian Sports Sedan Championship at the end of 2003, it was won by Darren Hossack driving a Saab 9-3.
Calendar
The series was contested over five rounds with three races per round.| Round | Circuit | Date |
| 1 | Mallala Motor Sport Park | 9 May |
| 2 | Winton Motor Raceway | 6 June |
| 3 | Oran Park Raceway - South Circuit | 27 June |
| 4 | Eastern Creek International Raceway | 1 August |
| 5 | Oran Park Grand Prix Circuit | 13 November |
Eligible cars
The following cars were eligible to compete in the series:- Class SS: Space framed Sports Sedans complying with CAMS Group 3D Sports Sedan regulations
- Class TS: Transam cars complying with regulations for North American Transam competition
- Class TZ: TraNZam cars complying with the relevant New Zealand regulations
- Class TA: Australian TA cars complying with National Australian Sports Sedan Association Class TA regulations
Points system
| Position | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | 11th | 12th | 13th | 14th | 15th | Other finishers |
| Points | 20 | 18 | 15 | 136 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
In addition, 2 points were awarded for first place in qualifying.