Hennessey Porsche Panamera Turbo

Hennessey tickles our petrolhead pleasure spot in ways other tuners just can't.

Its built a Bugatti-baiting bad-boy called the Venom GT which spits out over 1,000bhp. Exactly the right amount of power to reconfigure some quite important digestive function.

And now Hennessey has tickled the Porsche Panamera Turbo by adding a cat-back exhaust system to produce 550bhp - 50bhp more than standard.

Still unconvinced? Unbutton ear-type openings and watch this video.