Californian Porsche tuner Gunther Weeks will bid for class victory on the Goodwood Festival of Speed hillclimb this week with a 1000bhp-plus reimagining of the iconic Porsche 911 Slantnose.

Project F-26 – numbered for the amount of examples that will be built, at around £1.2 million apiece – is a fighter jet-inspired recreation of the distinctive 935 Slantnose of the 1970s, based on the 993-generation 911.

It's powered by a twin-turbocharged (but still traditionally air-cooled) Mezger 4.0-litre flat six, co-developed with a racing firm to produce a colossal 1067bhp – a little more than the Ferrari 849 Testarossa, for reference – and some 750lb ft of torque.

Sent through a six-speed manual gearbox and limited-slip differential to the rear axle, those outrageous reserves should be good for true supercar performance figures, given the carbon-bodied F-26 weighs only 1225kg dry - less than a Lotus Emira. 

Gunther Works is hoping it will take the fastest time in its class when it runs up the hill at the Sussex festival next weekend, with ex-Formula 1 and Nascar driver Scott Speed at the helm.

The company will field the F-26 in the production road car category, the fastest of which at 2025's event was the Koenigsegg Sadair's Spear, which ascended the 1.16-mile climb in just 47.14sec.

The outright hillclimb record is still held by Gloucestershire-based McMurtry, whose 1000bhp electric fan car, the Spéirling, went from bottom to top in 39.08sec in 2023 - a record that's unlikely to be broken for some time.