Flatout GR40 Coilovers : 0–2” Adjustable Rally Competition Suspension

The Flatout GR40 coilovers are engineered for serious drivers who demand precision, strength, and consistency in rally and motorsports competition. With an adjustable 0–2 inches of ride height increase, the GR40 lets you fine-tune your chassis setup for tarmac, gravel, or rallycross, all while maintaining balance, control, and durability under extreme conditions.

Featuring inverted front shocks for rally-grade strength and external reservoir rear shocks for endurance, the GR40 is built to handle punishing terrain and repeated high-speed impacts. Combined with proprietary valving and bypass piston technology, this system provides superior comfort at low speeds and unmatched control when the pace increases.

Key Features of the GR40 Coilovers

• 0–2” adjustable ride height → tune stance and ground clearance for rally and competition.

• Inverted front shocks → maximum strength, reduced flex, and improved stability in harsh conditions.

• External reservoir rear shocks → greater oil capacity for cooling and fade resistance.

• Proprietary rally valving with bypass pistons → compliant at low speeds, controlled at high speeds.

• Soft rate LPS 2.5 ID linear springs → comfort on transit, performance in competition.

• OEM-style top mounts → maintains quiet operation and reduced NVH.

• Electroplated shock bodies → 7–10 years of corrosion resistance.

• Rebuildable coilover design → serviceable and race-ready longevity.

• 1-way rebound adjustable → 20 points of tuning for driver preference.

• Backed by a 3-year warranty for confidence in competition.

Why Rally Drivers Choose the GR40

• Built for rally, rallycross, and motorsport competition.

• Delivers precision handling, durability, and endurance over gravel, tarmac, and mixed surfaces.

• Provides the control of a motorsport suspension without sacrificing comfort during transit stages.

• Serviceable and customizable for long-term competition use.

• Proven in real-world rallycross and grassroots competition.

Driver Reviews

⭐️⭐️⭐️⭐️⭐️ “I’ve had the GR40s for over a year, running rallycross and even a track day. They’ve taken a beating and still perform flawlessly. If you want competitive rally suspension, this is it.”

⭐️⭐️⭐️⭐️⭐️ “Cornering is predictable and smooth, even with added weight from a spare carrier and roof gear. The suggested spring rates kept the car level and balanced. This is a true rally suspension.”

The Flatout GR40 0–2” Adjustable Coilover Suspension is the choice for drivers who want to compete with confidence. Whether you’re tackling rally stages, rallycross courses, or grassroots motorsport, the GR40 delivers rally-strength durability, precision adjustability, and race-proven performance.