15-19 Subaru Outback

The Flatout Suspension GR40-PRO is an extreme-duty off-road coilover suspension system designed for drivers who push their vehicles far beyond the pavement. Built for hardcore off-roaders, overlanders, and expedition-style builds, the GR40-PRO delivers the strength, adjustability, and endurance needed to handle demanding terrain with confidence.

Unlike basic spacer lifts or standard shock and spring setups, the GR40-PRO features professional-grade inverted shocks, external reservoirs, and advanced bypass valving for superior performance over rocks, washboard roads, sand, mud, and technical trails. With 0–3” of adjustable lift and fully adjustable damping, this system is engineered for serious off-road capability.

Key Features

• 0–3” Adjustable Lift
  Increase ground clearance for larger tires and more aggressive off-road terrain.
• Inverted Shock Design
  Rally-proven construction delivers exceptional strength and durability under extreme off-road abuse.
• External Reservoir Shocks
  Increased oil capacity improves cooling and provides fade-resistant performance during long trail runs.
• Advanced Valving with Bypass Pistons
  Smooths rough terrain, absorbs hard impacts, and maintains control in technical driving conditions.
• Fully Adjustable 3-Way Damping
  Independently adjust:
  • Rebound
  • High-Speed Compression
  • Low-Speed Compression
    Perfect for crawling, overlanding, towing, or high-speed desert driving.
• Fully Rebuildable Construction
  Designed for long-term serviceability and heavy off-road use.
• Electroplated Shock Bodies
  Provides 7–10 years of corrosion resistance in mud, snow, rain, and salted environments.

Designed For

• Hardcore off-road enthusiasts
• Overland and expedition vehicles
• Heavy builds with bumpers, winches, rooftop tents, and cargo
• Drivers demanding premium off-road suspension performance

Customer Benefits

• Increased clearance and durability for extreme terrain
• Fade-resistant performance with external reservoirs
• Handles heavy loads without sagging or instability
• Adjustable for crawling, fast trail driving, or loaded overlanding
• Built for long-term reliability in harsh off-road conditions