DISCLAIMER: This is a made to order item. The lead time for this product is 4-8 weeks.

Flatout GR40-PRO Coilovers for 2005-07 Subaru STI

The Flatout GR40-PRO Coilover Suspension is our top-of-the-line, rally-proven system designed for professional motorsport drivers, rallycross competitors, and serious enthusiasts. Engineered for maximum durability, precision, and adjustability, the GR40-PRO provides the tools needed to handle tarmac, gravel, or mixed-surface stages while maintaining comfort during transit.

Unlike entry-level or mid-tier coilovers, the GR40-PRO features advanced valving, inverted shocks for rally-strength durability, and external reservoirs for superior heat dissipation and long-lasting performance. This is a professional-grade suspension built to survive the harshest racing conditions.

Key Features

• Motorsport-Grade Construction → Built for rally, rallycross, and competitive motorsport

• Ride Height Adjustable (0–2”) → Fine-tune stance and geometry for your surface

• Inverted Shock Design → Maximum strength, reduced flex, and improved heat dissipation

• External Reservoir Shocks → Increased oil capacity for fade-free endurance

• Advanced Valving & Bypass Pistons → Comfort in transit, precision under load

• Fully Adjustable 3-Way Damping → Rebound, high-speed, and low-speed compression tuning

• Rebuildable Design → Serviceable for long-term racing use

• Premium Electroplated Finish → 7–10 years corrosion resistance

Who Is the GR40-PRO For?

• Professional Rally Drivers → Compete confidently in ARA, NASA, and other rally/rallycross events

• Grassroots Competitors → Take your racing setup to pro-level performance

• Motorsport Enthusiasts → Drivers who demand maximum durability, adjustability, and race-winning precision

Customer Benefits

• Rally-proven design trusted by competitive drivers

• Handles the harshest conditions — tarmac, gravel, or dirt stages

• Delivers precision handling, endurance, and control

• Fully adjustable suspension to match your driving style and terrain