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

Flatout CS PRO Coilovers for 2015–2021 Subaru STI

The Flatout CS PRO Coilover System is a professional-grade 3-way track suspension designed specifically for the 2015–2021 Subaru STI. Built for track days, time attack, and competitive road racing, the CS PRO system delivers the adjustability, durability, and precision required for high-performance driving.

Equipped with inverted front shocks, external reservoirs, and advanced 3-way damping control, these coilovers allow drivers to independently adjust rebound, high-speed compression, and low-speed compression. This provides the flexibility needed to fine-tune suspension behavior for different track conditions, driving styles, and tire setups.

Height Adjustment Range

• Front: 0.5" to 2" lower than OEM

• Rear: 0.5" to 2" lower than OEM

Key Features

• Designed for Track Performance → Ideal for road racing, time attack, and high-performance track driving.

• 3-Way Adjustable Dampers → Independent adjustment of rebound, high-speed compression, and low-speed compression.

• 2 Inverted Front Assemblies with Reservoirs → Improved strength, durability, and heat management.

• 2 Rear Upright Assemblies with Reservoirs → Consistent damping and stability under heavy track use.

• Radial Bearing Front Mounts → Improved steering precision and suspension articulation.

• Eibach Linear Rate Springs (450F / 450R) → Balanced grip and predictable performance.

• Electro-Plated Nickel Shock Bodies → Corrosion-resistant finish for long-term durability.

• Rebuildable Monotube Shocks → Serviceable for extended performance and tuning.

• CNC Machined High-Flow Aluminum Pistons → Smooth and responsive damping performance.

• Stainless Steel Shims & Medium-Weight Synthetic Oil → Reliable damping under extreme loads.

• Ride Height Adjustable → Maintain suspension travel while adjusting stance.

• Camber / Pillowball Upper Mounts → Improved alignment capability and cornering response.

• Sensor Line Brackets on Lower Mounts → Retains OEM sensor routing.

• Individual Replacement Parts Available

• 3-Year Warranty Against Defect

Assembly

• Assembled in the USA

Why Choose CS PRO?

• Built for serious track performance and competitive driving.

• 3-way adjustable damping allows precise suspension tuning for any circuit.

• External reservoirs help prevent heat fade during long track sessions.

• Rebuildable design ensures long-term reliability and serviceability.

The Flatout CS PRO Coilovers transform the 2015–2021 Subaru STI into a track-ready performance machine, delivering the precision, adjustability, and durability required for competitive motorsport.