Evidently a Challenger can run with the lightweights. Wasn't even the SRT.
http://www.thetruthaboutcars.com/2009/07/review-2009-dodge-challenger-rt-track-pack
I was so disappointed in the R/T’s track ability that I borrowed a 19911.6-liter Miata on Falken Azenis tires and staged a two-car race with a fellow NASA instructor and Time Trial competitor. Could the Challenger pass the Miata in a series of six single-lap “battles”? The Internet’s conventional wisdom: the little Mazda would handily hold off the fat, slouchy Dodge. In the real world, I murdered the Miata. I blasted by the Elan-like roadster every time in the straight between Turns Three and Four, before trail-braking and grinding the sidewalls all the way down the entrance to Four.
And a review of it on the track.
Review: 2015 Dodge Challenger SRT “Hellcat” 6MT | The Truth About Cars
That said, for a car that can haul you and 4 friends to the track and run low 11s for $60k it is remarkable that it was built. Certainly not a perfect track car but perfectly competent. Would I buy one, no. But then I have a roadster with 6lb/hp to play with. A pentastar convertible? Would trade our daily driver in a heartbeat.