Flatout Suspension 05-14 Ford Mustang [GR40] GR4-0514MUSTANG

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

Flatout GR40 Coilovers for 2005–2014 Ford Mustang

The Flatout GR40 Coilovers are engineered for drivers who demand precision, strength, and consistency on both the track and rally stages. Compatible with 2005–2014 Ford Mustang models, this system offers 0–2” adjustable ride height, allowing you to fine-tune your chassis for tarmac, gravel, or rallycross.

Designed for motorsport-level durability, the GR40 features inverted front shocks for strength, external reservoir rear shocks for endurance, and proprietary valving with bypass pistons for unmatched performance. Whether you’re commuting or competing, these coilovers provide a smooth ride at low speeds and superior control under extreme conditions.

Key Features

Adjustable Ride Height (0–2”)

Fine-tune your stance and ground clearance for competition or street driving.

Inverted Front Shocks

Rally-grade strength, reduced flex, and improved stability in demanding conditions.

External Reservoir Rear Shocks

Increased oil capacity for better cooling and fade resistance during high-speed runs.

Proprietary Rally Valving with Bypass Pistons

Soft and compliant at low speeds, firmer at high speeds for precise control.

Soft Rate LPS 2.5 ID Linear Springs

Comfort on transit stages and reliable performance in competition.

OEM-Style Top Mounts

Maintains quiet operation with reduced NVH.

Electroplated Shock Bodies

7–10 years of corrosion resistance for long-term durability.

Rebuildable Coilover Design

Serviceable and race-ready for extended lifespan.

1-Way Rebound Adjustable

20 points of tuning for driver preference.

Warranty

Backed by a 3-year warranty for peace of mind in competition.

Why Rally Drivers Choose GR40

• Proven in motorsport – trusted in rallycross and grassroots racing.

• Precision handling – maintains control over gravel, tarmac, and mixed surfaces.

• Durable & Serviceable – ready for repeated high-speed impacts and long-term use.

• All-in-one solution – replaces stock suspension with a fully adjustable, rally-ready system.

The Flatout GR40 Coilovers give your 2005–2014 Mustang the performance, control, and durability needed for both daily driving and competitive motorsport.