The power is generated by a purpose-built 7.0-liter LSX V8 engine.

American tuner Hennessey Performance has detailed an upgrade package designed to boost the Chevrolet SS' power output to a whopping 1,000 horsepower at 6,300 rpms.

Starting with a bone-stock SS, Hennessey has tossed out the 6.2-liter LS3 V8 engine in favor of a 7.0-liter LSX mill equipped with forged low compression pistons, forged steel connecting rods, a forged steel crankshaft and ported heads. Built in-house by Hennessey, the engine is fully balanced and blueprinted.

The eight cylinders are fed by a thoroughly upgraded fuel injection system and two large turbochargers cooled by a pair of air-to-air intercoolers.

Power is transferred to the rear wheels via either a strengthened version of the SS' six-speed automatic transmission or a six-speed manual unit built in-house.

Visually, the Hennessey-tuned SS stands out from the stock SS thanks to bespoke badges on the trunk lid and on the rocker panels, model-specific floormats and an engraved plaque on the dashboard. Buyers who want a more aggressive-looking car can opt for premium wheels, CarbonAero body panels and a number of interior upgrades including carbon fiber trim on the dashboard and on the center console.

Hennessey has not detailed how much the 1,000-horsepower SS will cost, saying only that it comes with a one year / 12,000-mile warranty and that it cannot be legally registered in the state of California.