https://www.cnet.com/roadshow/news/hennessey-exorcist-camaro-1000-hp-demon-destroyer/

What does it take to make a Hennessey Performance Engineering Exorcist Camaro? Well, it all starts with the excellent Gen 6 Camaro ZL1 and its Corvette Z06-based supercharged cam-in-block LT-series engine, which in stock trim produces 650 hp. HPE then takes the 1.7-liter supercharger that comes with the engine and trashes it, replacing it with a 2.9-liter blower that creates all the boost in the world. Next, the car is treated to new machined cylinder heads, a more efficient intercooler and a set of long-tube headers.

All of this gentle massaging allows the Exorcist Camaro to hit a top speed of 217 miles per hour, which is four mph more than the brand-new Corvette ZR1 that showed Roadshow Editor-in-Chief Tim Stevens such a good time at Willow Springs. An interesting tidbit to note is that the Exorcist Camaro prototype uses the GM 10-speed transmission, and it achieved its top speed in ninth gear. Interestingly, it hasn't yet attempted to beat the Demon on its home turf, aka the drag strip, though Hennessey says that it will be conducting those tests soon.