As performance standards continue to evolve, early generations of the Porsche GT3—particularly the 991.1 GT3—can greatly benefit from modern suspension technology. While Porsche’s factory PASM-equipped dampers and rubber suspension bushings offered excellent road compliance when new, they now show their age when compared to newer GT3 platforms such as the 991.2 or 992.

In response, high-performance solutions like the Motion Control Suspension (MCS) 3-way damper system, combined with Dundon’s upgraded suspension components, offer a complete transformation of the 991.1 GT3’s handling character—without compromising reliability or daily drivability.

From OEM Comfort to Precision Control

The original 991.1 GT3 features electronically adjustable dampers with only basic firmness settings. In contrast, the MCS 3-way damper system provides independent adjustment of rebound, low-speed compression, and high-speed compression—each with 18 distinct settings. This allows the driver to tailor suspension behavior across different driving environments, from city roads to high-speed track conditions.

The dampers are paired with Dundon’s suspension hardware, including track-spec springs, adjustable lift cups (for ground clearance), and reinforced top mounts. The result is significantly sharper turn-in, improved cornering stability, and enhanced mid-corner feedback.

Suspension Geometry: Key Improvements

One of the primary advantages of this upgrade lies in correcting suspension geometry under load. Lowering the vehicle by up to 25 mm with preloaded springs improves center-of-gravity height and front-to-rear rake without compromising mechanical grip. Additional benefits include:

• Anti-dive and anti-squat optimization during braking and acceleration
  
• Increased camber range, thanks to upgraded control arms
  
• Improved mechanical traction during mid-corner weight transfer
  
• Reduced understeer tendency, especially at turn-in

These improvements are particularly noticeable on tracks such as Yas Marina or Dubai Autodrome, where chassis balance and steering precision are critical.

Installation Considerations and Technical Notes

Upgrading to this system involves a meticulous installation process, as documented by Dundon Motorsports. Key elements include:

• Interior removal to access suspension top hats, particularly in cars equipped with a roll bar
  
• Removal of original dampers, including safe depressurization of the PASM system
  
• Clean routing of external remote canisters for ease of access and adjustment
  
• Proper torque application for all major fasteners, supported by torque charts
  
• Accurate nitrogen pressurization (175 psi recommended for both axles)

The kit also supports continued use of Porsche’s front axle lift system, provided the appropriate hardware is selected.

Handling After Installation

Once installed and correctly aligned, the MCS 3-way system paired with Dundon’s suspension hardware dramatically changes the GT3’s character. The car becomes:

• More responsive at turn-in
  
• More composed during high-speed braking
  
• More predictable under throttle, particularly during corner exit
  

Ride quality remains firm but controlled, with enough adjustability to accommodate both aggressive track setups and more compliant street settings.

Service and Maintenance

As with any motorsport-grade system, periodic inspection and servicing are recommended:

• Track-only vehicles: Suspension service every 40 hours of use
  
• Street/track dual-purpose: Service recommended every 20,000 km or 24 months
  
• Nitrogen pressure checks: Monthly inspections ensure optimal gas pressure is maintained

Importantly, the system integrates seamlessly with the factory electronics. A PASM delete module is included to prevent warning lights or ECU errors following removal of the original dampers.

Conclusion

The Porsche 991.1 GT3 remains a rewarding and capable car, but suspension technology has advanced significantly since its launch. Upgrading to a Dundon + MCS suspension system elevates the vehicle’s dynamic potential, improves driver feedback, and aligns the car’s handling with modern GT3 standards—while preserving comfort and reliability.To learn more about Dundon suspension and exhaust systems for your Porsche or to discuss a tailored application, please contact Autohaus Middle East. Our technical team will be glad to assist with your enquiry.