Engineered to racing specifications, tested and proven over decades on winning racing teams. Integrating the highest-level technologies into an affordable street-spec coilover, our systems are a perfect, affordable solution for your daily driven performance vehicle. Built with daily driven sports cars in mind, our Pro-ST shock absorbers are shorter than factory, lowering the vehicle approximately 3-inches while still retaining full shock travel. This, coupled with the 12-way damping adjustability and stiffer springs, allows you to adjust to the perfect setting for the driving environment. Large 52mm seamless carbon steel mono-tube shock bodies provide strength and provide room for a larger hydraulic piston and valves, more shock oil, and an enlarged nitrogen chamber. All of these upgrades add up to huge jumps in compression and rebound response, vastly improved handling characteristics, and extreme durability even in the harshest of 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 for independent changes in ride height and spring preload, giving the ability to tune each corner's weight to achieve 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, we chose to fit linear rate springs instead of progressive. Featuring spring rates of 10kg/mm up front and 8kg/mm in the rear, the linear spring offers more consistency under all different measures of weight loading while cornering and hitting bumps. This offers the most predictable vehicle feedback in all driving situations. Each spring is made from the highest quality AE9254V Chrome Vanadium forged to work with our oil-nitrogen filled strut to provide the greatest possible balance of street and track performance. Pro-ST Coilover Shock Absorber Set; Front 10K/Rear 8K Spring Rates; Set of 4; Spring Rates (Front/Rear): 8 kg/mm/5 kg/mm.
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Part Brand: Skunk2 Racing
Part Number: 541-05-8780
Engineered to racing specifications, tested and proven over decades on winning racing teams. Integrating the highest-level technologies into an affordable street-spec coilover, our systems are a perfect, affordable solution for your daily driven performance vehicle. Built with daily driven sports cars in mind, our Pro-ST shock absorbers are shorter than factory, lowering the vehicle approximately 3-inches while still retaining full shock travel. This, coupled with the 12-way damping adjustability and stiffer springs, allows you to adjust to the perfect setting for the driving environment. Large 52mm seamless carbon steel mono-tube shock bodies provide strength and provide room for a larger hydraulic piston and valves, more shock oil, and an enlarged nitrogen chamber. All of these upgrades add up to huge jumps in compression and rebound response, vastly improved handling characteristics, and extreme durability even in the harshest of 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 for independent changes in ride height and spring preload, giving the ability to tune each corner's weight to achieve 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, we chose to fit linear rate springs instead of progressive. Featuring spring rates of 10kg/mm up front and 8kg/mm in the rear, the linear spring offers more consistency under all different measures of weight loading while cornering and hitting bumps. This offers the most predictable vehicle feedback in all driving situations. Each spring is made from the highest quality AE9254V Chrome Vanadium forged to work with our oil-nitrogen filled strut to provide the greatest possible balance of street and track performance. Pro-ST Coilover Shock Absorber Set; Front 10K/Rear 8K Spring Rates; Set of 4; Spring Rates (Front/Rear): 8 kg/mm/5 kg/mm.
Vehicle Fitment
2017-2021 Honda Civic Si Sedan 1.5L Turbo (FC1)
2017-2021 Honda Civic Si Coupe 1.5L Turbo (FC3)
Fitment Notes
Complete coilover system for front and rear
Includes front camber plates for alignment adjustability
Lowers vehicle approximately 3 inches below factory ride height
Maintains full suspension travel when properly installed
Professional alignment recommended after installation
Features
12-way adjustable damping from street comfort to track firm
52mm seamless carbon steel mono-tube shock bodies
High-pressure nitrogen-filled dampers with synthetic shock oil
Larger hydraulic piston and valves for improved response
Linear rate springs for consistent feedback under varying loads
Knurled adjustment knobs accessible without wheel removal
Specifications
Part Number: 541-05-8780
Brand: Skunk2 Racing
Series: Pro-ST
Type: Full Coilover System
Damping Adjustment: 12-Way
Front Spring Rate: 10 kg/mm (560 lbs/in)
Rear Spring Rate: 8 kg/mm (448 lbs/in)
Spring Type: Linear Rate
Spring Diameter: 2.5 inches
Spring Material: AE9254V Chrome Vanadium
Shock Body: 52mm Carbon Steel Mono-Tube
Damper Type: Oil/Nitrogen Filled
Warranty: Lifetime
Included Components
2 Front Coilover Assemblies
2 Rear Coilover Assemblies
Front Camber Plates
Adjustment Wrenches
Mounting Hardware
Product Description
The Skunk2 Pro-ST coilover system delivers race-proven suspension technology in an affordable street-focused package for 2017-2021 Honda Civic Si models. Large 52mm seamless carbon steel mono-tube bodies house precision-valved dampers with high-pressure nitrogen and synthetic oil for exceptional compression and rebound response. Linear rate AE9254V Chrome Vanadium springs (10kg front, 8kg rear) provide consistent handling feedback across varying loads. The 12-way adjustable damping allows quick tuning from comfortable street settings to aggressive track performance without removing wheels. Engineered based on decades of Skunk2 professional racing experience.
*Parts are for USA spec vehicles, please contact us to verify fitment on JDM & international models.
· · · SHIPPING · · ·
Free shipping across the contiguous 48 United States (excludes Hawaii and Alaska). Item(s) ships on the same day or within 1 business day. Delivery time is within 2 to 4 business days excluding next day deliveries. Orders over $750 require signature for delivery.
Canada customers - If eBay does not collect import & duty fees during checkout, the shipping carrier will collect them prior to delivery.
· · · RETURNS · · ·
Your complete shopping satisfaction is our #1 priority. If an item you ordered from us does not meet your expectations, please contact us within 30 days of receiving the item(s). If your order arrives damaged from shipping please contact us and we will provide a prepaid return label to send back for a replacement or refund.
Returned items must be in the original packaging (including plastic wrapped items) and in brand new condition.
Any returns received installed, mounted, used or missing components will be subject to return fee's.
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· · · CONTACT US · · ·
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