Hennessey has released the first details about their upcoming tuning program for the 2016 Cadillac CTS-V.

Designed to be "world's fastest four-door sedan," the CTS-V will be stripped of its supercharger and be equipped with twin turbos.  The 6.2-liter V8 engine will also receive forged aluminum pistons, a custom crankshaft and ported cylinder heads.  Other highlights include a high-performance fueling system, an electronic boost controller, an air-to-air intercooler, K&N air filters and a stainless steel sports exhaust system.

Thanks to these modifications, the engine will produce 1,000 bhp (745 kW).  Hennessey estimates this will enable the car to hit a top speed approaching 240 mph (386 km/h).

Production will be limited to 24 units for the 2016 model year but there's no word on pricing.

If that sounds like overkill, the company is also working on a slightly tamer package which will enable the supercharged 6.2-liter V8 engine to produce between 750-800 bhp (559- 596 kW).

Gallery: Hennessey's upcoming Cadillac CTS-V aims to be the fastest four-door in the world

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