Flatout Suspension GR40 Coilovers – 1–3" Lift Rally-Inspired Suspension System

The Flatout Suspension GR40 is designed for drivers who want the perfect balance of daily-driving comfort, increased ground clearance, and serious off-road and rally performance.

Offering 1–3" of lift over stock ride height, the GR40 provides the additional clearance needed for trails, rallycross, gravel roads, and overland adventures while maintaining the smooth, controlled ride quality you expect from a well-engineered suspension system.

Built with inverted front shocks for rally-inspired strength and external reservoir rear shocks for improved cooling and endurance, the GR40 delivers high-level performance in a complete, practical suspension package.

Whether you're a weekend off-roader, rallycross competitor, overland enthusiast, or simply looking to get more capability from your vehicle, the GR40 provides the adjustability, durability, and performance to take your build further.

IMPORTANT: The Flatout Suspension GR40 is intended for OFF-ROAD USE ONLY and is not designed or intended for use on public roads. Please allow 8–10 weeks for production and delivery. This product is built to order.

Key Features

• 1–3" Lift Over Stock Ride Height — Increase ground clearance and suspension capability for trails, rallycross, gravel roads, and overland builds.

• Inverted Front Shocks — Heavy-duty inverted construction provides increased strength and stability in demanding conditions.

• External Reservoir Rear Shocks — Increased oil capacity helps improve cooling and endurance during extended off-road use.

• Proprietary Off-Road Valving with Bypass Pistons — Designed to provide softer damping at lower speeds for comfort and firmer control as speeds and impacts increase.

• Soft-Rate LPS 2.5 ID Linear Springs — Designed to enhance ride comfort without compromising off-road performance.

• OEM-Style Top Mounts — Helps reduce noise, vibration, and harshness (NVH) for quieter, more comfortable operation.

• Electroplated Shock Bodies — Corrosion-resistant construction designed to provide 7–10 years of protection in demanding environments.

• Rebuildable Shock Design — Allows for long-term serviceability and maintenance.

• 1-Way Rebound Adjustable — 20 points of adjustment allow you to fine-tune suspension response to match your vehicle, driving style, and terrain.

• 3-Year Warranty — Backed by a 3-year warranty for additional peace of mind.

Why Choose the Flatout GR40?

Daily-Driver Ready

The GR40 is engineered to provide a smooth and controlled ride on pavement while maintaining the performance needed for demanding off-road driving.

Rally Inspired

Inverted front shocks, external reservoir rear shocks, and performance-oriented valving provide the strength, cooling capacity, and control needed for aggressive driving and rallycross applications.

Complete Lift Solution

The GR40 replaces your factory suspension with complete coilover assemblies, eliminating the need for spacer lifts or mismatched spring-and-shock combinations.

Customizable Performance

Spring rates can be tailored to match your vehicle and build, from near-stock configurations to heavier setups equipped with rooftop tents, spare tire carriers, bumpers, recovery equipment, and additional gear.

Built for Long-Term Use

Corrosion-resistant components, rebuildable shock assemblies, and a 3-year warranty provide long-term durability and serviceability.

Who Is the GR40 For?

The GR40 is an excellent choice for:

• Daily-driven off-road vehicles

• Rallycross and performance builds

• Overland and adventure rigs

• Weekend trail vehicles

• Drivers who regularly travel gravel and washboard roads

• Vehicles carrying additional camping or recovery equipment

• Enthusiasts looking for increased capability without sacrificing comfort

Customer Reviews

⭐️⭐️⭐️⭐️⭐️
"Hands down night and day difference over a factory suspension. It ate up every bump and rock on the trail. Even with a rooftop tent and spare tire carrier, the ride sits level and stable. 10/10 job Flatout."

⭐️⭐️⭐️⭐️⭐️
"I live in a rural area and needed something functional, not just aesthetic. The GR40s were exactly what I was looking for — quality build, smooth install, and great performance both on and off road."

⭐️⭐️⭐️⭐️⭐️
"Game changer. After a year with the GR40s and multiple rallycross events, they've taken a beating and still perform flawlessly. If you want competitive rallycross suspension, these are it."

⭐️⭐️⭐️⭐️⭐️
"Great lift suspension. Perfect for overland and camping. The ability to customize spring rates is a huge plus."

Built for the Street-to-Trail Enthusiast

The Flatout Suspension GR40 1–3" Lift Coilover System delivers increased ground clearance, adjustable damping, customizable spring rates, and rally-inspired durability in one complete suspension package.

From rallycross and technical trails to gravel roads and overland adventures, the GR40 is built to provide the performance, control, and durability needed to push your vehicle further.

⚠️ Ordering & Lead Time

OFF-ROAD USE ONLY. This suspension system is designed specifically for off-road applications and is not intended for use on public roads.

Estimated lead time: 8–10 weeks. The GR40 is built to order. Please allow approximately 8–10 weeks for production and delivery before placing your order.