The 2005 Tranzam Sports Sedan Series was a national motor racing series sanctioned by the Confederation of Australian Motor Sport and open to drivers of: Sports Sedans complying with CAMS Group 3D regulations Transam cars complying with National Australian Sports Sedan Association regulations TraNZam cars complying with TRG of New Zealand regulations Australian Tranzam cars complying with National Australian Sports Sedan Association regulations
The series was contested over a five round series.