The HPE1000 upgrade for the Dodge Demon increases the factory 840 horsepower to a tire-shredding 1,035 horsepower and 948 lb-ft torque. That equates to approximately 880 horsepower at the rear wheels after the car’s automatic transmission drivetrain loss. The Hennessey HPE1000 upgrade also shaves the 0-60 mph time to an incomprehensible 1.9 seconds. The HPE1000 upgrade includes a massive 4.5L supercharger system that replaces the factory 2.7L system. The upgrade also includes stainless steel long tube headers, a high-flow air induction system, upgraded throttle body, upgraded fuel pump and fuel injectors, with the company’s custom engine management calibration. All said and done, HPE1000 customers will walk away with a 1 year / 12,000 mile limited warranty from Hennessey Performance.
Source: Hennessey Performance