AST 5100 Series 1-way with Front Top Mount INVERTED CO Suspension for Porsche 997 Carrera 4 / 4S / Turbo 4 / Turbo S - 2005-2009

AST 5100 Series 1-Way Inverted Coilover Suspension

Porsche 997 911 Turbo (2005–2009)

The AST 5100 Series 1-Way Inverted Coilover Suspension is a high-performance suspension solution developed specifically for the Porsche 997 Carrera 4/4S and Turbo, delivering exceptional handling, improved feedback, and enhanced control for fast road and track-focused driving.

Featuring an inverted front strut design for increased rigidity and durability, this kit includes AST front top mounts to allow for precise suspension geometry and improved steering response. The monotube dampers are engineered and assembled in the Netherlands, offering motorsport-derived performance with everyday usability.

Ideal for enthusiasts seeking a premium suspension upgrade without compromise, the AST 5100 Series strikes the perfect balance between comfort, control, and adjustability.

Technical Description

• Vehicle Compatibility:
  
  

  • Porsche 911 (997) Carrera 4

  • Porsche 911 (997) Carrera 4S

  • Porsche 911 (997) Turbo 4 / Turbo S

  • Model years: 2005–2009

  • Drivetrain: AWD (Turbo 4)

   

• Manufacturer: AST Suspension

• Series: 5100

• Damping: 1-way adjustable (rebound & compression combined)

• Configuration: Inverted front strut design

• Top Mounts: Front AST top mounts included with ACT- P2204S

• Damper Type: Monotube coilover

• Ride Height Adjustment: Yes

• Use: Fast road / track day

• Build Quality: Hand-assembled in the Netherlands 

   

• Fully rebuildable design: AST Moton suspension can be completely disassembled, serviced, and rebuilt, extending service life and allowing re-valving or refurbishment to restore like-new performance rather than replacement.
  
  

  • Upgrading: AST 5100/5200/5300 “5000-series” dampers are built modularly and can be upgraded, but what’s involved depends on which step you’re taking and your exact Porsche chassis/kit spec.
    
    

    • 5100 → 5200 or 5300: Generally possible by sending the dampers to an authorized AST rebuild/upgrade center to add the required internals and remote reservoirs (and associated hardware). This “upgrade path” is a commonly stated feature of the AST 5000-series modular design.
      
      

    • 5200 → 5300: Typically the straightforward upgrade (adding the extra compression circuit/adjustment hardware). Many dealers describe the 5200 as a good “start here, upgrade later” option for that reason.
      
      

  For any questions and more details re upgrade options please speak to a member of the team
  

• Installation: Professional installation is recommended
  
  
• PASM Vehicles: Vehicles fitted with Porsche Active Suspension Management (PASM) will require coding to prevent faults & error messages & correctly disable the system. 
  As an alternative option, where access to coding is not possible, a PASM cancellation kit can be purchased through us at RW Performance. If you are unsure and need any technical advice, please contact a member of the team!