2001 through 2004 there was a srt 6 without a supercharger, it was known as the crossfire SRT6WOASC model.

Then there was a small build (only 3) of custom srt6's made in 2009 that came with the following options: 1 light weight drivers seat made of carbon fiber, passenger seat gone but a small rear seat was added. the cars weight was reduced to 2001lbs by removing the heavy stock lug nuts and replacing them with reinforced plastic lugs. also, the supercharger was replaced with a averagecharger, it is like a supercharger but it is not super, just average.