A quick look at this dyno video reveals Hennessey’s VR1200 package for the CTS-V delivers an incredible 1,066 horsepower to the rear wheels. According to Hennessey, that equates to an insane 1,226 horsepower and 1,109 pound-feet of torque at the flywheel.
To achieve these figures, Hennessey does away with the CTS-V’s quite capable supercharged 6.2-liter V-8 and installs a new 7.0-liter unit. To this, a pair of turbochargers is bolted on, along with forged internals, high-flow cylinder heads and injectors, a custom camshaft, a new fuel system, dual wastegates, a full stainless steel exhaust system, new intakes, a custom engine management system and electronic boost controller.
The vehicle is fitted with a six-speed manual transmission as standard, though an automatic can be fitted after undergoing a special performance build and torque converter upgrade.
The end result, according to Hennessey’s own estimates, is a 0-60 mph time of 2.9 seconds, a quarter mile ET of 10.2 seconds at 141 mph, and a top speed of 242 mph.
To go with the drivetrain mods, Hennessey also upgrades the brakes with new Brembos, adding huge 15.1-inch carbon ceramic discs with eight-piston calipers up front, and the same size discs but with six-piston calipers in the rear. These reside within 20-inch wheels shod with Michelin Pilot Super Sport tires.
2013 Hennessey VR1200 Twin-Turbo Cadillac CTS-V CoupeEnlarge Photo
The final touch is the addition of a full carbon package, which adds a new front splitter, widened fenders, an integrated diffuser and a vented hood. Inside, owners can select to have most of the surfaces re-trimmed in carbon fiber and Alcantara.
Only 12 of these beasts will be built, each with their own serial-numbered dash and engine plaques.