Hennessey has started production of the Velociraptor 600, a modified version of the Ford F-150 Raptor.
The Texan tuner’s 558bhp take on Ford’s performance pick-up truck can hit 60mph in 4.2sec, thanks to a range of upgrades to its twin-turbocharged 3.5-litre petrol V6.
New induction systems, an enlarged intercooler and a revised engine management system mean the Velociraptor can complete a quarter-mile sprint in just 12.9sec - a full second faster than the standard Raptor.
The Velociraptor has 672lb ft of torque - a third more than the Raptor – and six-piston Brembo front brakes are offered as an option to increase stopping power.
Despite these modifications, the truck still comes with a three-year warranty.
Customers can specify their Velociraptor with new front and rear bumpers and 20in custom wheels, while an Off-Road upgrade package brings 37in off-road tyres and a suspension-levelling kit.
Just 250 examples of the Velociraptor will be produced, with a price “typically in the region of $115,000” (£84,000).
The truck will make its public debut at the Barrett Jackson auction in Arizona on 22 January, with customer deliveries beginning immediately after.
Hennessey founder and CEO John Hennessey said: “The Velociraptor has been our most popular vehicle for years, so with production of the third-generation truck now under way, we’re anticipating building hundreds of models throughout 2022.
“The stock Raptor is a fabulously capable and very quick machine, so our customers love that we can enhance its power and performance to new levels.”