The SRT model was only made in 2005/2006. Most of them were made in 2005, the 2006 srts are quite rare. My car was sold to me brand new as a 2008 Crossfire SRT with 20ks on the clock. But the build date was in 2006.
In Australia they are aloud to do that

A fixed wing, SRT stitching on the seats, 15 spoke rims and a more aggressive front bar distinguish the difference between the limited and srt range