One of my most favorite tuners is Hennessey Performance Engineering (HPE), because it always surprises me with its supreme and outstanding projects. The newest one aims to be world's fastest four-door sedan and will be based on the Cadillac CTS-V. In fact, the model can't be seen on the streets yet, since its market launch begins later this year.

But when this happens, we will have more than 640 hp and a top speed of nearly 200 mph. The team at HPE finds this as the perfect basis, since it is planning to make an HPE1000 Twin Turbo CTS-V.

The last versions of the CTS-V tuned model, was a VR1200 Twin Turbo coupe, which ran 221 mph (356 km/h) on State Highway 130. John Hennessey believes that the new 2016 Twin Turbo CTS-V will have a top speed of more than 240 mph (386 km/h).

If you are already interested in buying one, then it's probably better to make a reservation soon, since there are going to be produced only 24 units. They will be driven by a strengthened 6.2L V8 engine, which will lose its factory supercharger but will gain twin turbos for more power and better performance.

There is also going to be also a wide range of performance upgrades like carbon-ceramic brakes, larger wheels and tires as well as a widebody upgrade. Custom interior also made it in the plan.

But more importantly, the performance upgrades will allow the V8 to produce more than 780-800 horsepower. And this promise makes us very impatient, doesn't it?

2016 Hennessey Performance Cadillac CTS-V HPE1000 Twin Turbo , 1 of 2
2016 Hennessey Performance Cadillac CTS-V HPE1000 Twin Turbo , 2 of 2

Video Source: YouTube

Source: Hennessey Performance