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

Flatout GR40 Rally Competition Coilovers for 2015–2021 Subaru STI

The Flatout GR40 coilovers are designed for drivers who demand precision, strength, and consistency in rally and motorsport competition. With 0–2” adjustable ride height, these coilovers let you fine-tune your Subaru STI for tarmac, gravel, or rallycross, providing balance, control, and durability under extreme conditions.

Featuring inverted front shocks for rally-grade strength and external reservoir rear shocks on select applications for endurance, the GR40 handles harsh terrain and repeated high-speed impacts. Proprietary valving with bypass pistons ensures comfort at low speeds while maintaining control at high speeds.

Key Features

• 0–2” Adjustable Ride Height → Customize stance and ground clearance for rally and competition.

• Inverted Front Shocks → Maximum strength, reduced flex, and improved stability.

• External Reservoir Rear Shocks (application dependent) → Increased oil capacity for cooling and fade resistance.

• Proprietary Rally Valving with Bypass Pistons → Compliant at low speeds, precise at high speeds.

• Soft Rate LPS 2.5 ID Linear Springs → Comfort on transit, performance in competition.

• OEM-Style Top Mounts → Quiet operation with reduced NVH.

• Electroplated Shock Bodies → 7–10 years corrosion resistance.

• Rebuildable Coilover Design → Serviceable and race-ready longevity.

• 1-Way Rebound Adjustable → 20 points of tuning for driver preference.

• 3-Year Warranty → Confidence in competition-ready performance.

Why Rally Drivers Choose the GR40

• Built for rally, rallycross, and motorsport competition.

• Provides precision handling, durability, and endurance on gravel, tarmac, and mixed surfaces.

• Offers motorsport-level control without sacrificing comfort during transit stages.

• Serviceable and customizable for long-term competition use.

• Proven in real-world rallycross and grassroots events.

The Flatout GR40 Coilovers for the 2015–2021 Subaru STI deliver rally-grade durability, adjustability, and performance, making them a professional-level suspension upgrade for both competitive and enthusiast drivers.