If you're in the fortunate position of having enough cash to buy a hand-built, customized restomod Porsche 911, there are several routes you can follow.

Singer is undoubtedly the most famous of the 911 specialists, but we recently toured the Gunther Werks studio in California, and its products are arguably just as impressive. Before you click on the link, make sure you have a box of tissues nearby. (Get your mind out of the gutter, man. The 400R is pretty enough to drive a man to tears.)

There is a third option, but it doesn't pop up as often as Singer and Gunther Werks. Theon Design is based in the UK and has built at least two stunning restomods that we know of.

Now Theon Design is ready to unveil its latest creation, the CHI001.

The CHI001 is a fully restored 964 Porsche 911 commissioned by a customer in Chile. It has a lightweight carbon body, a semi-active suspension, and a 400 horsepower 4.0-liter flat-six.

Theon Design says its mission is distilling and enhancing the essence of the air-cooled 911. The idea behind the company comes from its founder, Adam Hawley, a self-professed Porsche fanatic. Hawley has more than two decades of experience in the automotive industry, having worked at BMW, Jaguar Land Rover, Lexus, and Lotus.

"Our intent is clear," explains Hawley. "We apply an OEM-grade approach with Computer-Aided Design (CAD) and manufacture to enhance a classic Porsche, delivering the best possible quality. At the same time, we are careful to honor Porsche's heritage and engineering ethos; we're totally focused on lightweight construction and delivering truly engaging driving dynamics. CHI001 pushes this to new heights and is a fantastic example of what Theon Design is capable of."

The 964 in question was stripped and fully restored using Porsches' past and present design cues. This is the first time Theon Design has used carbon fiber for most of the body. It was used to construct the roof, hood, engine lid, spoiler, bumpers, and sill covers, while only the doors are steel to aid side impact protection.

Each component was rendered using CAD to ensure ultimate precision. "At Theon, attention to detail is everything," explains Hawley. "You can see this not only with the stunning exterior of CHI001 but also wherever you look under the skin. Every single component on the car is treated with the same degree of focus, whether visible or not."

The car is finished in Viola Metallic, which debuted on the 30th Anniversary 964 911, introduced in 1993. The 17-inch Fuchs-style wheels have body-colored centers, with champagne-colored petals and outer rims, while the special paint is complemented by Noble Chrome brightwork.

This model is powered by one of Theon's largest naturally aspirated engines. The 4.0-liter flat-six is a beast, but customers can also order a less fierce 3.6 NA six-cylinder. If you prefer going down the road sideways, Theon offers supercharging and turbocharging options.

This particular 964 started life as a Carrera 4, but now it only sends the full 400 horses to the rear wheels via a six-speed manual gearbox. A Wavetrac limited-slip differential helps keep the car under control once things inevitably start going sideways.

Underneath, the car boasts Theon's hydroelectric power-steering, a switchable exhaust, and RS-spec semi-active suspension from specialists TracTive, which provides independent damping control. There are five damping modes, but there's no need to dive underneath the car to adjust the suspension.

Instead, the driver uses a milled aluminum rotary switch in the center console. It's a slightly less advanced version of the suspension controls found the in the all-new Porsche 911 GT3 RS.

With so much power, you need powerful brakes. Theon ditches the standard discs and pads and upgrades them to carbon. The custom aero-grade active wing ensures optimal downforce while keeping the car as light as possible.

The result of all these lightweight materials is staggering. With all fluids and a full tank of fuel, CHI001 weighs just 2,566 pounds. For reference, a 2022 911 Carrera S with a manual transmission weighs 3,298 lbs, and its twin-turbo flat-six produces 443 hp.

The interior was crafted to the owner's specifications, but it showcased what Theon is capable of. It blends old-school 911 interior design with modern technology. The Recaro Club Sport seats in the front are finished in patinated leather with woven Porsche Royal Purple accented leather panels. The Touring seats in the rear are also finished with woven leather panels.

Carbon fiber trimmed with leather has been used extensively throughout, including the center console, which also features exposed carbon panels. Modern additions include a wireless phone charger, Bluetooth connectivity, and high-end Focal amplifiers and speakers in both front doors.

"Our dedication to delivering exactly what the customer wants is illustrated perfectly by CHI001's ultra-bespoke, exquisitely finished cabin," says Hawley. "It's a truly unique creation, developed in close collaboration with the client over hundreds if not thousands of hours. The resulting interior blends the warmth and timeless quality of a classic Porsche cockpit with the very best in terms of modern comfort, convenience, and neatly integrated technology."

Prices for Theon Design commissions start at $417,000. Each car is a unique collaboration with the customer and takes 18 months to build. Price excludes donor car, shipping, and local taxes.