Skunk2 Pro-ST Coilover Kit | 17 - 20 Civic Si

Fits:

• 2017 - 2020 Honda Civic Si (Coupe FC3, Sedan FC1)

Note: ADS Error Light will illuminate on the dash, as an Error Canceler Kit is not included. Professional installation is recommended for optimal alignment and performance.

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Transform your Civic Si with the Skunk2 Pro-ST Coilover System, a race-engineered solution built for the balance of street drivability and track performance. Drawing from decades of racing success, Skunk2 packs high-level technology into an accessible, street-spec coilover system for enthusiasts who want an affordable upgrade without cutting corners.

Pro-ST is tailored for daily-driven sports cars, with shorter shock absorbers that lower the car by approximately 3 inches without compromising shock travel. 12-way damping adjustability and stiffer springs give you the flexibility to fine-tune the suspension to match your driving style. Large 52mm seamless carbon steel mono-tube shock bodies bring increased hydraulic piston and valve sizes, more shock oil, and an enlarged nitrogen chamber — all adding up to improved compression and rebound response, better handling characteristics, and durability in harsh conditions.

Independent adjustment of ride height and spring preload allows precise tuning for optimal corner balance and ride quality. Shock bodies and threads are protected with gold-colored zinc electroplating, while the lower shock mount is powder-coated for element resistance. Linear-rate springs (10kg/mm front, 8kg/mm rear) are crafted from high-quality AE9254V chrome vanadium for consistent performance and predictable feedback across driving scenarios.

Features

• 12-way adjustable damping for a tailored suspension setup
• Seamless carbon steel mono-tube design for strength and responsiveness
• Independently adjustable ride height and spring preload
• Linear-rate chrome vanadium springs: 10kg/mm front, 8kg/mm rear
• Anodized top mounts and polyurethane bushings for durability and precise handling
• Lowers ride height approximately 3" without compromising shock travel
• Includes 1x Skunk2 Pro-ST coilover system and 2x spanner wrenches