Skunk2 17-20 Honda Civic Si Pro-ST Coilovers

Engineered to racing specifications and proven over decades with winning racing teams, our Pro-ST coilovers integrate high-level technologies into an affordable street-spec solution for your daily-driven performance vehicle. Built with daily-driven sports cars in mind, the Pro-ST shock absorbers are shorter than factory, lowering the vehicle approximately 3 inches while still retaining full shock travel. Coupled with 12-way damping adjustability and stiffer springs, this allows you to tune the setup perfectly for any driving environment.

Large 52mm seamless carbon steel mono-tube shock bodies provide strength and accommodate a larger hydraulic piston and valves, more shock oil, and an enlarged nitrogen chamber. These upgrades deliver huge gains in compression and rebound response, vastly improved handling characteristics, and extreme durability even in the harshest conditions.

Externally, the shock bodies are threaded along their length to fit spring preload adjustment collars and the internally threaded lower shock mount and collar. This allows independent changes in ride height and spring preload, giving the ability to tune each corner’s weight for optimal 4-wheel corner balance without sacrificing ride quality. Additionally, the shock body and threads are protected from the elements with gold-colored zinc electroplating.

After rigorous testing, linear rate springs were chosen over progressive springs. Featuring spring rates of 10 kg/mm up front and 8 kg/mm in the rear, the linear springs provide consistent performance under varying weight loads while cornering and navigating bumps. This ensures the most predictable vehicle feedback in all driving situations. Each spring is crafted from high-quality AE9254V Chrome Vanadium steel, designed to work with our oil-nitrogen-filled struts for the perfect balance of street and track performance.

This Part Fits: