It is the Hennessey Mammoth 6x6. This huge six-wheel ... with more than just combustion engine rivals. The GMC Hummer EV Pickup slots into second place with its 1,000 hp power figure.

Hennessey Performance's HPE1000 package for the 2016 Chevy Camaro SS adds a supercharged and strokes the engine to 6.8 liters to make 1,000 hp. If the 455-horsepower 2016 Chevrolet Camaro SS isn't ...

Hennessey Performance Engineering is taking engine output to ludicrous levels with its 1,000-horsepower tune for the 2016 Cadillac CTS-V. The key to the upgrade is dropping he V8's supercharger ...