DISCLAIMER: This is a made to order item. The lead time for this product is 8-10 weeks.

Flatout GR50-PRO Stage Rally Suspension for 2005–2007 Subaru STI

The Flatout GR50-PRO suspension system is built for 2005–2007 Subaru STI owners who demand professional-grade stage rally performance. Designed for serious rally competitors, the GR50-PRO delivers ultimate control, precise chassis response, and unmatched durability.

At the heart of the system is a massive 50 mm piston housed in a 62 mm shock body, providing high oil volume, superior damping, and heat capacity to handle the most punishing rally environments. 3-way adjustable damping (High-Speed Compression, Low-Speed Compression, and Rebound) allows full customization for gravel, tarmac, or snow surfaces.

Each kit is hand-built, dyno-tested, and fully rebuildable, incorporating motorsport-grade materials, radial-bearing front assemblies, high-flow CNC pistons, and Eibach 70 mm metric springs, delivering confidence and precision across every stage.

Suspension Travel

• Front Travel: 6.5 inches

• Rear Travel: 7 inches (for GC/GD chassis)

Key Features

• Designed for Stage Rally Competition → Built for professional and grassroots rally teams.

• 2 Front Assemblies with External Reservoirs → Improved oil capacity and heat management.

• 2 Rear Assemblies with External Reservoirs → Consistent performance under heavy rally loads.

• 50 mm Pistons → High-volume damping for ultimate control.

• 62 mm Shock Bodies → Enhanced cooling and long-term durability.

• 3-Way Damping Adjustment → Independent control of:

  • High-Speed Compression

  • Low-Speed Compression

  • Rebound

• Radial Bearing Front Assemblies → Smooth steering and improved suspension articulation.

• Eibach 70 mm Metric Springs → 225 lb/in Front / 200 lb/in Rear for balanced rally performance.

• Secondary Helper Springs → Optimized traction and ride balance.

• Electro-Plated Nickel Cartridges → Superior corrosion resistance.

• Rebuildable Inverted Shocks → Long-term serviceability.

• CNC-Machined High-Flow Aluminum Pistons → Precision damping.

• Stainless-Steel Shim Stack → Reliable valving under heavy loads.

• Medium-Weight Synthetic Shock Oil → Consistent damping performance.

• Spherical Bearing Upper Mounts (Standard) → Increased articulation and durability.

• Brake and Sensor Line Brackets → Secure and clean routing.

• Individual Components Available → Simplifies rebuilds and servicing.

Why Choose the GR50-PRO?

• Built specifically for stage rally competition

• Massive 50 mm piston design for extreme durability and damping capacity

• 3-way adjustable damping for precise rally suspension tuning

• External reservoirs for improved cooling and fade resistance

• Fully rebuildable for long-term motorsport reliability

The Flatout GR50-PRO Suspension System transforms the 2005–2007 Subaru STI into a true competition-ready rally machine, offering the strength, adjustability, and endurance needed for serious motorsport.