AST Suspension 5300 3-way Adjustable Inverted Coilovers - Porsche 997 C4/C4S/Turbo 4/Turbo S

AST Suspension 5300 3-Way Adjustable Inverted Coilovers

Porsche 997 Carrera 4 / Carrera 4S (2005–2012) – Turbo 4 / Turbo S (2005–2009)

The AST Suspension 5300 3-Way Adjustable Inverted Coilover Kit is a motorsport-derived suspension solution developed for Porsche 997 AWD models. Designed for drivers demanding ultimate control on both road and track, the 5300 series delivers exceptional damping precision, stability under load, and consistent performance in aggressive driving conditions.

Featuring an inverted monotube front strut design, the AST 5300 significantly improves rigidity, reduces unsprung mass, and enhances steering response—making it ideal for high-performance and track-focused applications. Independent 3-way adjustment allows fine tuning of rebound, high-speed compression, and low-speed compression to suit driving style, surface conditions, and tyre setup.

Hand-built in the Netherlands using premium motorsport components, the AST 5300 offers race-proven reliability with the flexibility required for fast road and circuit use.

Technical Specification

• Application: Porsche 997 AWD models / Turbo Gen.1/ Gen.2

  • Carrera 4 / Carrera 4S (2005–2012)

  • Turbo 4 / Turbo S (2005–2009 - 2009 - 2012)

• Suspension Type: Coilover kit (front & rear)

• Adjustment: 3-way independent damping

  • Rebound

  • High-speed compression

  • Low-speed compression

• Front Design: Inverted monotube struts

• Rear Design: Monotube dampers

• Ride Height Adjustment: Yes

• Top Mounts: Motorsport-spec (camber adjustable options available depending on configuration)

• Use: Fast road / track / motorsport

• Build: Hand-assembled by AST Suspension (Netherlands)

• Serviceable & Rebuildable: Yes 

  • 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.
        

• Installation:Professional installation, alignment and geometry 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!