Say hello to the Hennessey V650, a Cadillac CTS-V Coupe fluffed up to produce a satisfying 650-hp at the flywheel. This dyno run shows the wheels deliver a very adequate 544 hp and and 562 lb-ft of torque.
Source:
jalopnik Tuning
https://www.tuning-links.com/news_995_Hennessey-Tuned+Cadillac+CTS-V+Coupe+Pushes+650-HP+In+Glorious+Dyno+Run.html