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

Flatout GR40R Rally-Ready Coilovers for 2015–2021 Subaru STI

The Flatout GR40R is the evolution of the GR40 coilover system, engineered for rally, rallycross, and competitive motorsport use. Unlike the GR40, the GR40R comes with external reservoirs on all four shocks, increasing oil capacity, improving cooling, and eliminating fade during extended or high-intensity sessions.

Whether you’re tackling gravel rally stages, tight rallycross courses, or consecutive track sessions, the GR40R ensures consistent, precise damping performance where lesser systems struggle.

Key Features

• External Reservoirs on All Four Shocks → Increased oil volume for cooler temperatures and fade-free performance.

• 0–2” Adjustable Ride Height → Fine-tune stance and suspension geometry for rally or motorsport applications.

• Inverted Shock Design → Maximum strength and rigidity for harsh impacts.

• Bypass Piston Valving → Smooth compliance over small chatter and firm control over large jumps or bumps.

• 1-Way Rebound Adjustment → Easy tuning to match surface-specific conditions.

• Rebuildable Construction → Long-term serviceability and performance tuning.

• Electroplated Shock Bodies → 7–10 years of corrosion resistance for reliable operation.

Who Should Choose the GR40R?

• Rally Drivers → Consistent performance over long stages with essential heat management.

• Rallycross Racers → Short, intense sessions requiring precise, fade-free damping.

• Motorsport Enthusiasts → Grassroots competitors seeking pro-level suspension without stepping up to GR50R.

• Builders & Tuners → Ideal for projects needing rally-strength durability and endurance.

Customer Benefits

• Fade-Free Performance → External reservoirs maintain damping consistency under extreme conditions.

• Rally-Proven Strength → Inverted shocks and advanced valving handle harsh motorsport demands.

• Adjustable Rebound → Tailor suspension behavior to your driving style and terrain.

• Reliable, Rebuildable Design → Serviceable for multiple seasons of competitive use.

• Enhanced Consistency & Control → Outperforms standard GR40 coilovers in rally and motorsport conditions.

The Flatout GR40R Coilovers deliver professional-grade rally and motorsport suspension for the 2015–2021 Subaru STI, offering durability, adjustability, and endurance to dominate any stage or competition.