Aftermarket tuner Hennessey Performance Engineering has added more power to Ford's ferocious F-150 Raptor pickup with the Hennessey VelociRaptor 500, and now "Top Gear USA" has had a chance to test it, with the Stig behind the wheel.

The truck has a 501-horsepower supercharged 5.4-liter V-8, high-flow air induction, stainless steel headers and catback exhaust, and special exterior and interior badging.

There's also a 1-year/12,000-mile limited warranty.

Hennessey claims the truck can run 0-60 in 5.6 seconds and hit the quarter-mile in 14.1 seconds.

Take a gander at the video below to see the Stig putting this amped-up truck through its paces.