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.
-
Ride Height: Adjustable 0–2”
-
External Reservoirs: All four shocks for cooler temps and endurance
-
Damping: 3-way adjustable damping for surface-specific tuning
-
Best For: Rally, rallycross, and grassroots motorsport competitors
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.
-
Ride Height: Adjustable 0–3”
-
External Reservoirs: All four shocks for maximum cooling and oil capacity
-
Damping: 3-way adjustable damping for surface-specific tuning
-
Best For: Professional rally, rallycross, and motorsport teams
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.
-
Ride Height: Adjustable 0–3”
-
External Reservoirs: All four shocks for long-distance cooling and fade resistance
- Damping: 3-way adjustable for precision tuning
-
Best For: Adventure rigs, overlanders, and heavy-duty off-roaders
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.
-
Ride Height: Adjustable 0–3”
-
External Reservoirs: All four shocks with maximum oil volume
-
Damping: 3-way adjustable for precision tuning
-
Best For: Hardcore off-road builds, expedition rigs, and heavy vehicles with armor, bumpers, winches, and trailers
The ultimate suspension system for overlanders and extreme off-road enthusiasts who refuse to compromise.
Which PRO System Is Right for You?
-
GR40-PRO Rally → Affordable entry into pro rally suspension
-
GR50-PRO Rally → Flagship motorsport-grade coilovers with oversized 50mm/62mm design
-
GR40-PRO Off-Road → Heavy-duty, reservoir-equipped suspension for adventure rigs
-
GR50-PRO Off-Road → Extreme overland/expedition suspension built to carry the heaviest loads and tackle the toughest terrain