In standard trim the Cadillac CTS-V Coupe is already quite the potent performance machine, but hand it over to tuning firm Hennessey and the CTS-V can be transformed into a ballistic supercar.

Hennessey is no stranger to high-performance Cadillacs, the Texas-based tuner having already churned out 650 and 700 horsepower beasts, but now it’s taking the CTS-V badge to whole new heights.

Hennessey’s latest creation is the limited edition V1000 Cadillac CTS-V Coupe, of which only 12 are destined for production. Each will receive a custom twin-turbocharging system that will take output to a mind-blowing 1,000 horsepower and 950 pound-feet of torque.

Understandably, performance will be nothing short of amazing, with the 0-60 mph run expected to take just 3.5 seconds, the quarter mile to pass  in 10.9 seconds and top speed of 230 mph reachable.

The upgrade starts with a replacement of the supercharged LSA, which in standard trim already produces a heady 556 horsepower. In its place Hennessey installs a 7.0-liter V-8 with forged pistons, connecting rods and crankshaft, as well as high-flow cylinder heads, upgraded fuel injectors, the aforementioned twin-turbocharging system and new intakes and exhaust systems.

Customers can still select either manual or automatic transmissions, both of which require their own series of modifications. For the manual, Hennessey installs a dual friction clutch while the automatics receive a performance torque converter.

Brake hardware also gets an upgrade, with new Brembo carbon-ceramic units fitted all around. These reside within 20-inch wheels wrapped with Michelin Pilot Super Sport tires. As for the suspension, the V1000 Cadillac CTS-V Coupe gets a 1-inch lowering kit and shocks tuned by John Heinricy.

The exterior will also be dressed with a full carbon fiber bodykit, while the interior will get a mix of carbon fiber and Alcantara trim.

Despite the insane level of modification, Hennessey still provides a 1 year or 12,000 mile limited warranty on its installed components.

Hennessey is currently taking orders for the car and will also offer buyers a one-day driver training program run by John Heinricy.