Description:
Flat Out Suspension GR40-PRO Coilovers - 2005-2007 Subaru STI
The Flatout Suspension GR40-PRO represents the top tier of rally-proven coilover systems, engineered specifically for professional rally, rallycross, and competitive motorsport applications. Built for drivers who demand uncompromising strength, adjustability, and control, the GR40-PRO provides championship-level performance in the most extreme conditions. Unlike entry-level kits, it features advanced valving technology, inverted shock construction for maximum rigidity, and external reservoirs that enhance cooling and consistency over long stages. Whether youre racing on tarmac, gravel, or mixed terrain, the GR40-PRO gives you the precision and durability needed to competeand win.
Who Is the GR40-PRO For?
Professional Rally Drivers Compete confidently in ARA, NASA Rally, and rallycross events.
Grassroots Racers Step up from entry-level suspension to true professional-grade performance.
Motorsport Enthusiasts For those demanding ultimate adjustability, strength, and control in every race condition.
DETAILS:
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Motorsport-grade construction for rally, rallycross, and professional-level competition
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02 ride height adjustability to fine-tune stance and suspension geometry
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Inverted shock design for superior strength, reduced flex, and improved heat management
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External reservoir shocks for increased oil capacity and fade-free endurance
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Advanced valving with bypass pistons tuned for both comfort and control in rally conditions
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Fully adjustable 3-way damping: rebound, high-speed, and low-speed compression
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Rebuildable design for long-term service and competitive use
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Electroplated shock bodies offering 710 years of corrosion resistance
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Proven reliability in professional rally and motorsport competition
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Engineered to handle the toughest terrain and stage conditions
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Provides exceptional stability, precision handling, and endurance
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Fully adjustable setup that adapts to any surface or driving style
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