Hennessey is in the final stages of development and testing of the HPE650 Challenger SRT8. The V8 Hemi of 6.4 liters, acquired a TVS2300 supercharger, improved fuel system, new cylinder heads, new, less restrictive exhaust and other parts. According to Hennesey this Challenger is capable of 650 horses. But until it is available for sale you can see the video that follows.
