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Height-Adjustable Lowering With ST's Proven Fixed-Damping Setup
The ST X Coilover Kit gives the 2016-2021 Honda Civic FC/FK independent, on-car adjustable lowering with matched spring and damper rates engineered specifically for this chassis. Unlike ST's rebound-adjustable ranges, the X kit runs a fixed damping setup, delivering ST's signature blend of daily-driveable comfort and improved handling without the need to tune compression or rebound settings.
Key Features
- Height-adjustable lowering, independently adjustable front and rear
- Front lowering range of 25-45mm (1-1.8 in.)
- Rear lowering range of 30-50mm (1.2-2.0 in.)
- Progressive front springs with 285 lb/in. rear spring rate
- Fixed damping calibrated specifically for the Civic FC/FK chassis
- Galvanized steel construction for corrosion resistance
- Complete kit: 4 dampers, 4 springs, and full assembly hardware
Fitment
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2016-2021 | Honda | Civic | EX Sedan |
| 2016-2021 | Honda | Civic | EX Hatchback |
| 2016-2021 | Honda | Civic | EX-L Sedan |
| 2016-2018 | Honda | Civic | EX Coupe |
Specifications
| Detail | Value |
|---|---|
| Manufacturer part number | 13250037 |
| Chassis code | FC/FK |
| Lowering, front | 25-45mm (1-1.8 in.) |
| Lowering, rear | 30-50mm (1.2-2.0 in.) |
| Spring rate, front | Progressive |
| Spring rate, rear | 285 lb/in. |
| Damping adjustment | Fixed (non-adjustable) |
| Strut diameter | 50.6mm |
What's Included
- 2 front coilover struts
- 2 rear coilover struts/springs
- Spring perches and adjustment hardware
- Installation instructions
About the Brand
ST Suspensions is a German coilover manufacturer with decades of chassis tuning experience, producing height and damping adjustable coilover systems for a wide range of European, Japanese, and American platforms.
FAQ
What is the difference between ST X and ST XA?ST X uses fixed, non-adjustable damping, while ST XA adds rebound damping adjustability for further tuning.
How much can I lower my Civic with this kit?Front lowering ranges from 25-45mm and rear from 30-50mm, independently adjustable on the car.
Does this fit the Civic Type R or Si?No, this kit is designed for standard non-Si Civic FC/FK sedan, hatchback, and coupe models with a 50.6mm strut, verify your exact trim before ordering.
Is this kit height adjustable after installation?Yes, ride height can be independently adjusted front and rear while the coilovers are installed on the car.
Does this kit include both front and rear coilovers?Yes, this is a complete kit with 4 dampers and springs covering all four corners.
Will this work with a Civic equipped with factory electronic damping?No, vehicles equipped with factory electronic damping control require deactivation, confirm your trim's suspension type before ordering.
Is professional installation recommended?Yes, coilover installation affects alignment and handling, professional installation and a post-install alignment are recommended.
What is ST Suspensions' warranty on this kit?Contact ST Suspensions or your retailer for specific warranty terms on this coilover kit.
Installation Instructions
- Raise and safely support the vehicle, then remove all four wheels.
- Remove the factory struts and springs from each corner per the vehicle's service manual.
- Install the ST X coilovers in place of the factory units, torquing all mounting hardware to spec.
- Set the desired ride height using the adjustable spring perches at each corner.
- Reinstall the wheels and lower the vehicle.
- Have the vehicle professionally aligned before returning to normal driving.
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