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Flatout GR40/50-PRO Coilovers

Flatout Suspension GR40-PRO & GR50-PRO – Professional-Grade Coilover Systems

For drivers who demand the highest levels of strength, adjustability, and performance, Flatout Suspension offers the GR40-PRO and GR50-PRO — two professional-grade coilover systems designed to excel in motorsport competition and extreme off-road adventure.

Both systems feature external reservoirs on all four shocks, rebuildable designs, and pro-level adjustability. The difference comes down to scale: the GR40-PRO offers elite performance with a lighter, competition-focused package, while the GR50-PRO is our flagship system, built with oversized 50mm inverted dampers inside 62mm threaded housings for nearly indestructible strength in the harshest conditions.

? Rally & Motorsport Versions

Flatout GR40-PRO (Motorsport Focus)

The GR40-PRO is the perfect entry into professional-level motorsport suspension. Designed for rally and rallycross competitors, it offers external reservoirs on all four shocks, rebound adjustability, and bypass piston valving for consistent, fade-free performance.

Ideal for drivers who want pro-level coilovers at a lighter package and competitive price point.

Flatout GR50-PRO (Motorsport Focus)

The GR50-PRO is the flagship motorsport suspension system in our lineup. With 50mm inverted dampers inside massive 62mm threaded housings, plus external reservoirs and multi-way damping control, the GR50-PRO is built for the toughest rally stages and motorsport events.

The suspension system for serious competitors who demand the strongest, most tunable coilovers available.

? Extreme Off-Road & Overland Versions

Flatout GR40-PRO (Off-Road Focus)

For off-road adventurers and overland rigs, the GR40-PRO delivers durability and endurance at a lighter package than the GR50-PRO. With external reservoirs on all four shocks, it resists fade during long trail days, loaded camping trips, and punishing washboard roads.

Perfect for rigs with rooftop tents, cargo, or light trailers that need more endurance than standard coilovers.

Flatout GR50-PRO (Off-Road Focus)

The GR50-PRO Off-Road is built for the most demanding overland and expedition builds. With 50mm inverted dampers in 62mm housings, external reservoirs at all corners, and multi-way adjustability, it handles fully loaded rigs, technical crawling, and high-speed desert runs without compromise.

The ultimate suspension system for overlanders and extreme off-road enthusiasts who refuse to compromise.

Which PRO System Is Right for You?

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