Singer Vehicle Design has become the specialist at reimagining Porsche 911s into 1970s-inspired hot rods, and a company called Guntherwerks has started applying a similar approach to the 993 generation of the company’s iconic coupe from the mid 1990s. The firm unveiled its $525,000 400R at The Quail, A Motorsports Gathering, during this year’s Monterey Car Week. Gunther Werks will build a limited run of 25 of them starting later this year with deliveries in 2018.

Guntherwerks 400R Porsche 911

Instead of the 993’s usual 3.6-liter flat six, Gunther Werks installs a naturally aspirated 4.0-liter what produces over 400 horsepower (298 kilowatts) and 330 pound-feet (447 Newton-meters), versus 270 hp (201 kW) from the original powerplant. It runs through a six-speed manual gearbox.

See what else Gunther Werks can build:

Gunther Werks adds a widebody kit that evokes the broad shape of the 993-spec Porsche 911 GT2. It replaces the bumpers, fenders, and roof with carbon-fiber pieces. The muscular flares allow for the fitment of 315/30 18-inch rear tires. A set of KW Clubsport coilovers lets the coupe hunker down over the aggressive Pirelli P Zero Rosso rubber. There’s also an adjustable wing at the back. LED headlights lend a modern touch.

Guntherwerks 400R Porsche 911

The company also transforms the cabin by mixing luxury and sportiness. Leather and Alcantara cover fixed racing seats. A red background for the tachometer makes it grab attention in the instrument panel. A carbon-fiber panel replaces the rear seats, and there’s a half roll cage back there for extra safety on the track. Driving the 400R should be comfy because there’s air conditioning and heating. Belgium’s Conid Pens make the custom keys for the vehicle.

Gunther Werks clients can opt to donate their own 993-generation 911 for the conversion into the 400R, but the firm can source a donor car for customers, too.

Source: Gunther Werks

Gallery: Guntherwerks 400R Porsche 911 993

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Garden Grove, Calif. (August 18, 2017) – Guntherwerks, a company dedicated to remastering the iconic
Porsche® 993, held the global reveal of its highly-anticipated concept, the 400R, at The Quail, A Motorsports
Gathering on August 18. The company will begin producing a limited run of the concept later this year.

Hand-built and re-engineered from the ground up for the most discerning clientele, the 400R is built on a
Porsche® 993 platform, which is considered by many to be the pinnacle of the 911®. The 400R incorporates
modern technology, while still maintaining the essential components of the original car that inspired so
many enthusiasts. The body has been widened extensively with the bumpers massaged to blend seamlessly
to produce a unique silhouette, while still remaining instantly recognizable as a 993.

Each 400R is equipped with a 4.0L naturally aspirated air-cooled engine, hand-built and meticulously tested
by Rothsport Racing to produce over 400hp and 330lb/ft. No stone has been left unturned with the 400R.
From its top-of-the-line coilovers, massive 315/30/18 rear tires and adjustable aerodynamic capabilities,
the 400R is truly a performance-built machine.

The 400R’s interior is customizable, but fastidiously upgraded with leather and Alcantara options, fixed
bucket seats that pay homage to the vintage 993 race cars, a carbon fiber rear seat delete, a half cage
behind the driver’s head and a classic 5-dial dashboard with a rev counter in the middle.

“Aesthetically and technologically, the 993 is considered by many multiple decade Porsche aficionados as
the last real Porsche,” said car collector and Porsche enthusiast, Peter Nam, CEO of Guntherwerks. “With
the 400R, we set out to build a car that incorporated modern technology while still appealing to the
enthusiasts who covet these cars today. In essence, the 400R is the car we imagine Porsche would have
built if the advanced technology within the 400R was available.”

Only 25 examples will be made, with first customer deliveries expected by early 2018. Customers can supply
their own road-legal 1994-1999 993 Series Porsche® 911® Coupe for the basis of the Guntherwerks 400R
conversion. Alternatively, Guntherwerks can source a suitable donor car that can be used as the basis of
their 400R remanufacture.

About Guntherwerks

Based in Southern California, Guntherwerks was founded on the principles of passion, performance and a
drive to embed modern technologies into a classic masterpiece. Specializing in the development of aircooled
911s®, the company is currently working on the limited run production of the 400R. The
Guntherwerks 400R is a modern interpretation of Porsche’s last air-cooled 911®, the 993. Regarded by
many as the pinnacle of the 911®, the team at Guntherwerks has worked tirelessly to retain the driving
experience offered by the original car, while evolving its DNA. For more information please visit or follow us on Facebook and Instagram.

Guntherwerks is not sponsored, associated, approved, endorsed nor, in any way, affiliated with Porsche
Cars North America, Inc., or Dr. Ing. h.c.F. Porsche, AG. The Porsche® name and crest, 993® and 911® are
trademarks of Dr. Ing. h.c.F. Porsche AG, and any other products mentioned are the trademarks of their
respective holders. Any mention of trademarked names or other marks is for purpose of reference only.

# # #


The Guntherwerks 400R is a modern interpretation of Porsche’s last air-cooled 911, the 993.
Regarded by many as the pinnacle of the 911, the Guntherwerks team has worked tirelessly to
retain the driving experience offered by the original car, while evolving its DNA.

Customers can supply their own fully road legal 1994-1999 993 Series Porsche 911 Coupe for the
basis of the Guntherwerks 400R conversion. Alternatively, Guntherwerks can source a suitable
donor car that can then be used as the basis of their 400R remanufacture.


  • Guntherwerks carbon fiber body work including bumpers, fenders, roof and more.
  • Carbon fiber fenders are 30mm wider than stock
  • Custom adjustable rear spoiler
  • Fully integrated rear roll hoop and front strut bracing
  • 18 specific paint colors for the Guntherwerks 400R with bespoke options available


  • Rothsport 4.0 producing over 400hp and 330lbft of torque with a 7800rpm redline
  • Lightweight stainless steel equal length headers
  • Dual exit center mounted exhaust
  • Custom built Getrag G50 6 speed gearbox with bespoke gear ratios
  • Custom Carbon Clutch differential


  • Motec ECU
  • ECU controlled air conditioning and heating
  • Custom 3D printed housings complete with aerospace glass for the LED headlights
  • Retains the iconic taillight bar enhanced by the latest LED technology


  • KW Clubsport coil-overs, combined with KW HLS (Hydraulic Lift System) allowing the front
    of the car to be lifted over obstacles
  • Bushings, drop-links, and front/rear sway bars are uprated
  • Lightweight RS Spec EVO uprights from the Porsche competition program
  • Geometry settings modified to take advantage to the cars extra width
  • Brembo R35 GTR 6/4 Piston Billet Monoblock Calipers with 2-piece drilled rotors
  • High pressure braided brake lines
  • Brake vents built into the custom Guntherwerks front bumper



  • Custom developed 18’’ 3-piece forged aluminum wheels paying homage to the iconic
    wheels from the GT2.
  • Wheel Sizes: 18”x8.5’’ front and 18”x11.5’’ rear.
  • Tires are 245/35/18 front and 315/30/18 rear Pirelli P Zero Rosso tires



  • High performance custom Guntherwerks carbon fiber backed bucket seats available in a
    wide choice of colors and optional finishes
  • Guntherwerks carbon fiber rear seat delete.
  • The doors, dashboard, center console, armrests, rear quarter panels and dashboard insert
    all custom upholstered include deviated stitching; hounds tooth fabric inserts and full
    leather amongst many other options.
  • Bespoke aluminum pedals, door handles, speaker rings and ignition cover
  • Custom Guntherwerks gauges calibrated to 200mph & 7800rpm redline
  • Guntherwerks 2-piece carbon fiber luggage compartment liner


  • Guntherwerks 400R is supplied with two of these bespoke keys. They are presented in a
    custom made wooden box complete with a bespoke Guntherwerks Pen. Made by Conid
    Pens in Antwerp Belgium, they are as bespoke as the 400R itself.