2026 Theon Design MEX001
By Lorenzo Bianchi November 14, 2026
The 2026 Theon MEX001 is based on a Porsche 911 Carrera 4 (964), featuring carbon fibre bodywork, a bespoke RS-style ducktail and a 325 kg weight reduction from the original donor car.
Its naturally aspirated 3.8-litre air-cooled flat-six produces 407 bhp and 303 lb-ft of torque, with rear-wheel drive and TracTive semi-active suspension.
The bespoke commission features custom Olive Green paint, champagne detailing and a handcrafted interior. Each Theon build takes approximately 18 months, with prices starting at £430,000.
2026 Theon MEX001 Brings a New Approach to the Porsche 964
The 2026 Theon MEX001 is the latest bespoke Porsche 911 commission from British engineering specialist Theon Design, revealed on April 15, 2026.
Built from a 964-generation Carrera 4, the car has undergone extensive mechanical and visual changes, including a rear-wheel-drive conversion and a new carbon fibre body.
The project required approximately 6,000 working hours, with much of the attention going into weight reduction, mechanical response and the smaller details requested by its owner.
Carbon Fibre Bodywork and Custom Olive Green Paint
The exterior retains the familiar 911 shape, although nearly every body panel has been reworked in carbon fibre.
The original steel doors remain. Theon deliberately kept them to preserve the closing feel associated with older Porsche models.
At the rear sits a bespoke carbon fibre ducktail inspired by the 2.7 RS.
Its paint finish is equally specific. Theon combined two historical Porsche colours, Nato Olive Green and Underberg, to create a shade exclusive to this commission.
Light ghost stripes, champagne Porsche lettering and matching brightwork provide the finishing details.
Lightweight Construction and 18 Inch Fuchs Style Wheels
The completed car weighs 1,150 kg wet, representing a 325 kg reduction compared with the original Carrera 4 donor.
Its power-to-weight ratio reaches 354 bhp per tonne, matching the figure quoted for the 992.2-generation 911 GT3.
The exterior also features 18-inch Fuchs-style alloy wheels finished in champagne, with red Brembo-finished RS specification brakes behind them.
Michelin Pilot Sport 4 tyres complete the wheel package.
Handcrafted Interior With Recaro Seats
Inside, Theon has built the cabin structure from carbon fibre before trimming it in Liquorice and Saddle Brown leather.
The Recaro CS front seats feature Pepita cloth inspired by 1970s Porsche interiors, using updated material associated with the 991 Sport Classic.
A machined aluminium dashboard introduces a subtle raised section, complemented by milled metal air vents, door handles and window switches.
Modern equipment is deliberately discreet.
A Bluetooth-only audio system uses a Focal amplifier and six speakers, while USB-C charging ports remain hidden within the interior.
Naturally Aspirated 3.8 Litre Flat Six Engine
Theon has fitted a naturally aspirated 3.8-litre air-cooled flat-six producing 407 bhp and 303 lb-ft of torque.
The original all-wheel-drive Carrera 4 configuration has been converted to rear-wheel drive, with a rebuilt five-speed 964 gearbox.
A switchable exhaust operates quietly at lower loads before opening automatically during harder driving. Manual valve control is also provided.
TracTive semi-active suspension allows different driving characteristics, while a front axle lift supports everyday usability.
Bespoke Commission Pricing and Production
Theon develops each commission directly with its owner, with the process taking approximately 18 months.
Prices start at £430,000, excluding the donor vehicle, shipping and local taxes.
For this build, the combination of reduced weight, rear-wheel drive and personalised detailing reflects Theon's approach to developing individual air-cooled Porsche 911 commissions.














