Flatout Suspension 03-10 Porsche Cayenne [GR40]

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

03–10 Porsche Cayenne GR40 Coilovers – 1–3” Lift Rally-Inspired Suspension System

The Flatout GR40 Coilovers are designed for 2003–2010 Porsche Cayenne owners who want a suspension system that balances daily driving comfort with serious off-road and rally performance.

With 1–3 inches of adjustable lift over stock ride height, the GR40 provides the ground clearance needed for trails, overland travel, and rally-style driving, while maintaining the smooth and controlled ride expected on pavement.

Engineered with inverted front shocks for maximum strength and external reservoir rear shocks for improved cooling and endurance, the GR40 is built to handle demanding conditions while remaining practical for everyday use.

Whether you're building an overland-ready Cayenne, tackling gravel roads and off-road trails, or competing in rallycross, the GR40 coilover system delivers the performance, durability, and adjustability needed in a single complete suspension package.

Key Features of the GR40 Coilovers

• 1–3” Lift Over Stock Ride Height → Adds ground clearance for trails and off-road capability.

• Inverted Front Shocks → Improves strength and reduces flex in demanding conditions.

• External Reservoir Rear Shocks → Enhances cooling and performance during extended off-road use.

• Proprietary Off-Road Valving with Bypass Pistons → Softer at low speeds for comfort, firmer at higher speeds for improved control.

• Soft Rate LPS 2.5 ID Linear Springs → Provides improved ride comfort without sacrificing performance.

• OEM-Style Top Mounts → Maintains quiet operation and reduces NVH.

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

• Rebuildable Coilover Design → Long-term serviceability and performance tuning.

• 1-Way Rebound Adjustment → 20 levels of damping adjustment for dialing in ride quality.

• 3-Year Warranty → Backed by Flatout Suspension for reliability and peace of mind.

Why Choose the Flatout GR40 Coilovers?

Daily Driver Friendly
Delivers a smooth and controlled ride for everyday driving while providing additional ground clearance.

Rally-Proven Strength
Inverted shocks and external reservoirs are designed to withstand aggressive off-road and rally conditions.

Complete Lift Suspension System
A full coilover replacement that eliminates the need for spacer lifts or mismatched spring and shock combinations.

Customizable for Your Build
Spring rates can be tailored to match your setup, whether you’re running stock weight, rooftop tents, spare tire carriers, or additional gear.

Long-Term Durability
Corrosion-resistant finishes, rebuildable shock components, and a 3-year warranty ensure the suspension performs reliably for years.

The Flatout GR40 Coilovers transform the Porsche Cayenne into a capable daily driver, off-road explorer, or rally-inspired build, delivering the ideal balance of comfort, strength, and adjustable performance.