Riaction HONDA CIVIC SI FC (17-21) Coilovers

Upgrade the handling and stance of your Honda Civic Si with the Riaction Performance Shocks Coilover Kit designed for the 2017–2021 Honda Civic Si FC platform. Built for drivers who want sharper cornering response, improved ride control, and a properly lowered stance, this suspension system transforms your Civic Si into a more responsive and balanced street machine.

With 32 levels of damping adjustment and full-length ride height control, Riaction coilovers allow you to fine tune your suspension setup for comfortable daily driving or a firmer, performance-oriented feel. Each kit is constructed from premium materials with precision CNC-machined components to ensure consistent damping performance and long-term durability.

Every Riaction coilover kit is backed by a 2-year factory warranty against manufacturing defects, providing confidence that your suspension system is built to perform and designed to last.

🔧 Coilover Features

Full-Length Ride Height Adjustment

32 Damping Adjustment Levels

Mono-Tube Damper Design

Seamless 52mm Electroplated Carbon Steel Shock Body

O.D. 20mm Piston Rod For McPherson Suspension

O.D. 14mm Piston Rod For Non-McPherson Suspension

44mm High-Flow CNC 6061 Aluminum Piston

CNC 6061 Thinned Aluminum Floating Piston

SAE9254 Cold-Wound Springs

Polyurethane Oil Seals

Multi-Thickness Valving Shims

Low-Gas Pressure Design

7.5w Compounded Suspension Fluid

Fully Rebuildable Coilover Assembly

⚙️ Factory Spring Rates

Front: 6K
Rear: 6K

📧 International Orders

For all international orders, please contact us at info@riactionshocks.com

Riaction coilovers are engineered to enhance the handling, stance, and overall driving experience of your 2017–2021 Honda Civic Si FC.