RML Unveils Unique GTH Commission for Graham Rahal Performance

The striking exterior colour scheme places Singer Signal Orange paintwork on the majority of the carbon body, with visible carbon fibre and anthracite wheels providing the contrasts. The overall livery has a resemblance to the Dallara DW12 Indycar driven by Graham Rahal 2015 pre-season test session, with that car serving as a tribute to the first McLarens to take on the Indy 500.

An orange racing stripe starts on the front splitter, and is framed by carbon borders as it emerges from the S-duct in the bonnet. It continues over the roof and to the rear of the car, creating a visual break from the otherwise dark rear wing. The stripe takes a keen eye to spot at first, owing to its shape being created by unpainted carbon fibre creating negative space; this is repeated on the doors, where negative space creates GTH lettering within the low-set stripe.

Elsewhere, orange highlights are found on the leading edge of the front splitter, and framing the rear diffuser. The colour scheme evolves within the cabin, introducing a light grey alcantara into the mix. Set against the black dashboard, steering wheel, and exposed carbon fibre, the pair of lighter hues nicely complement each other on the door cards, centre armrest, and padding for the carbon fibre bucket seats.

A roll cage is found behind, matching the Singer Signal Orange of the exterior, while the dashboard hosts a special trim element marking the 40th anniversary of RML, and denoting the car as one of ten Anniversary Special Edition models. Even with the race-inspired upgrades and a harness for track use, the GTH retains the usability the 911 is renowned for. Apple CarPlay and Android Auto can be activated on the central infotainment display, and the parking sensors remain functional.

Beneath the reimagined exterior and customised interior is the result of a painstaking process to transform a 992.1 Porsche 911 Turbo S into a GT1 tribute with hypercar-baiting pace. Arriving at RML’s Wellingborough headquarters, each donor car is stripped of all its original bodywork until a bare chassis remains. From there, a brand-new carbon fibre body is assembled complete with a full-width clamshell bonnet and DRS-equipped rear wing. Working in harmony with an active front splitter and a bespoke rear diffuser, the car makes 923kg of downforce at 177mph - more than four times the downforce of a standard 911 Turbo S.

Roof-mounted air intakes feed a Litchfield-tuned 3.7-litre flat-six engine, which now develops up to 907bhp and 737lb-ft (1,000Nm) of torque in its Sport and Sport Plus driving modes. The resulting performance is certainly at hypercar level, with the GTH reaching 62mph in 2.4 seconds, and 100mph in just 4.5 seconds from rest. Beyond the Le Mans-inspired bodywork, and race-style centre-exit Inconel exhaust system, the GTH gets a comprehensive overhaul under the skin. Bespoke adaptive dampers developed by R53 allow for precise adjustments to the chassis stiffness, as well as quickly altering the ride height; the car can clear speed bumps on the road, or hug the tarmac on track.

The car made its public debut at the Air / Water event in Southern California, with Porsches of all ages and cooling methods in attendance. It is expected to make appearances at further shows and media events throughout the year. Production of the RML GTH continues in Wellingborough, with each example being hand-finished to its owner’s unique specifications. Prices for the conversion begin at £520,000 excluding the donor car and personalisation.