Gunther Werks GXR-Evo Pushes Carbon Fiber 911 to 2,386 Pounds

Updated on August 15, 2026 • 5 min read

Gunther Werks has unveiled the GXR-Evo, its most track-focused interpretation of the Porsche 911’s 993-generation platform to date. Limited to just 15 examples worldwide, the new model combines extensive carbon fiber construction with a naturally aspirated 4.0-liter flat-six, six-speed manual transmission and motorsport-derived chassis technology.

Revealed at The Quail, A Motorsports Gathering, the GXR-Evo has a claimed dry weight of only 2,386 pounds (1,082 kilograms) — 210 pounds lighter than the company’s Coupe.

For a car built around a decades-old 911 architecture, achieving that figure required more than simply increasing engine output. Gunther Werks has instead focused heavily on materials, component optimization and aerodynamic integration.

12K Carbon Fiber Forms the GXR-Evo Body

Carbon fiber is central to the GXR-Evo’s construction.

The vehicle receives a full carbon fiber body finished in a 12K 2×2 weave, with the material serving both structural and aerodynamic objectives within the overall vehicle design.

At the front, Gunther Werks has incorporated a large splitter, canards and airflow tunnels connected with vented front fenders. The arrangement is designed to manage pressure around the front of the vehicle while increasing downforce.

Carbon fiber is similarly prominent at the rear.

A newly developed high-downforce rear wing uses sculpted carbon fiber endplates, while the conventional rear window has been removed and replaced by an integrated shark-fin stability element.

Carbon fiber quarter windows also incorporate airflow paths feeding the engine.

Rather than applying carbon fiber primarily as a visible styling material, Gunther Werks has integrated it throughout the body and aerodynamic package as part of the GXR-Evo’s weight-reduction strategy.

455-HP Flat-Six Revs to Nearly 9,000 RPM

The lightweight body is paired with a naturally aspirated 4.0-liter flat-six engine co-developed with Rothsport Racing.

The four-cam, twin-valve engine produces 455 horsepower and can rev to nearly 9,000 rpm.

Power is transmitted through a comprehensively re-engineered Getrag G50 six-speed manual gearbox, maintaining the mechanical driving characteristics associated with the air-cooled 911.

Gunther Werks has also equipped the engine with a slide-valve throttle-body system.

Unlike conventional butterfly throttle valves, the system is intended to reduce obstruction within the intake tract and improve airflow at high engine speeds. A straight-pipe exhaust completes the powertrain configuration.

Combined with the 2,386-pound dry weight, the naturally aspirated engine gives the GXR-Evo a power-to-weight ratio of roughly 5.24 pounds per horsepower.

Lightweighting Extends Beyond Carbon Fiber

Carbon fiber is only one part of the mass-reduction program.

The GXR-Evo uses magnesium center-lock wheels, reducing unsprung mass compared with heavier conventional wheel designs.

The chassis has also been reworked around circuit performance, including a bespoke double-wishbone front suspension and JRZ three-way adjustable remote-reservoir dampers.

Brembo Pista race brakes and motorsport-grade ABS provide the braking package.

The result is a vehicle where carbon composites, magnesium and specialized motorsport components are used together rather than treating lightweighting as an isolated body-panel exercise.

Carbon-Kevlar Moves Into the Cockpit

Composite materials continue inside the GXR-Evo.

The driver sits in a Racetech carbon-Kevlar racing seat with a Schroth six-point harness, surrounded by an eight-point roll cage.

A configurable Motec display provides lap timing and race diagnostics, while a quick-release steering wheel reinforces the circuit-focused layout.

Additional systems include a pneumatic air-jack, electronic fire suppression and a helmet cooling system.

This stripped-back approach helps explain how Gunther Werks has reduced the vehicle’s mass despite adding equipment required for serious track operation.

Each Car Comes With a Carbon Fiber Racing Simulator

The use of composites even extends beyond the vehicle itself.

Every GXR-Evo customer will receive an individually numbered racing simulator developed with MYSIM.

Each simulator uses a hand-welded 6061-T6 aluminum structure covered with carbon fiber panels, visually linking it to the construction and material language of the car.

More importantly, Gunther Werks says each simulator will be configured to reproduce the dynamics of its corresponding GXR-Evo, enabling owners to practice before driving the physical vehicle on track.

Carbon Fiber Defines the Most Extreme Gunther Werks 911 Yet

The GXR-Evo illustrates how extensively composites can be incorporated when mass reduction becomes a primary design objective rather than a secondary consideration.

Its full 12K carbon fiber body, carbon aerodynamic components and carbon-Kevlar seating are combined with magnesium wheels and a naturally aspirated powertrain to produce a 993-based car weighing just 2,386 pounds.

Only 15 GXR-Evo examples are planned.

For the composites industry, the project is another example of carbon fiber moving beyond individual lightweight components and becoming part of a broader vehicle engineering strategy encompassing body construction, aerodynamics, interior components and overall mass optimization.

🔒 Content Transparency & Editorial Integrity

This article is developed based on real engineering experience, machine testing data, and practical production knowledge from Jota Machinery’s work in advanced composite manufacturing.

All technical explanations—including material structure, processing methods, and performance characteristics—are reviewed and verified by our engineering team to ensure accuracy and real-world relevance.

To improve clarity and structure, AI-assisted tools may have been used during content organization and language refinement. However:

• All key technical insights originate from first-hand industrial experience
• All data and claims are manually reviewed and validated
• The content is created with the primary goal of educating engineers, manufacturers, and buyers

We do not publish content solely for search ranking purposes. Every article is designed to provide practical, experience-based value to professionals in the composite materials industry.