Guntherwerks can turn your 993-generation Porsche 911 into a 400R

Article by Christian A., on August 20, 2017

A lot of us know Singer Vehicle Design and their signature work of reimagining Porsche 911s, and making them look like hot rods from the 70s. They are not alone as a company called Guntherwerks has recently been applying the same style to Porsche’s iconic coupe from the 1990s - the 993 generation.

During the Monterey Car Week, Guntherwerks decided to showcase one of their works, the 400R at The Quail, a Motorsports event. They revealed that this unique model costs half a million, or $525,000 to be precise. And the company plans to build only 25 examples of this beginning this year, where they will deliver the models in 2018.

A standard 993 is equipped with a 3.6 liter flat six. But Guntherwerks will replace this with a naturally aspirated 4.0 liter engine instead paired with a six-speed manual, with an output of around 400 horsepower (298 kilowatts) and 330 pound-feet (447 Newton-metres) of torque. Whereas with the old engine, the 993 only produced 270 horsepower (201 kilowatts).

Of course, there are a lot of noticeable changes on the outside, starting with the new bodykit that has been made wider, evoking the broad shape of the 993-spec Porsche 911 GT2. The tuned version will now have carbon fiber bumpers, fenders, and roof. It will be given a set of 315/30 18-inch rear tires, thanks to the more muscular flares. These Pirelli P Zero Rosso tires will work hand in hand with a set of KW Clubsport coilovers too. To finish off the exterior design, Guntherwerks gives it a pair of LED headlights up front, and an adjustable wing at the rear.

A makeover will never be complete if the cabin has not been touched, so the tuner adds a bit of sportiness and luxury to it, by combining leather and Alcantara racing seats finished in black, with red stitching. The tachometer now gets a red backdrop to make it stand out from the instrument panel. The rear seats have now been replaced by a carbon-fiber panel, as well as a half roll cage that will be important for the driver’s safety for track use. The 400R will definitely have a comfortable interior with proper air conditioning and heating. The keys are now custom made by Belgian company Conid Pens.

Guntherwerks will have to get donors for the cars they will be customizing. However, if you are an owner of the 993-generation 911, and you want an upgrade to turn it into a 400R, the company will be more than willing to take your car in to give it some tweaks, just be ready to shell out a considerable amount of cash.

Press Release


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.


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