Air Suspension category reference17-18 Honda Civic Si - Airtech Air Suspension
Choose year, make and model to confirm this application-specific product fits — you can add it to your cart either way.
Verify fitment- Two front air strut assemblies and two rear air strut assemblies
- Tool kit: spanner wrenches, damping adjustment knobs and application-specific brake line brackets
- Owner's manual
One approved application: 2017–2018 Honda Civic Si · Adaptive Damper will not function
- Ships from Mesa, AZ
- 12-month limited warranty
Specifications — CHD421-ASO
Product details
Two front and two rear air struts make up this Airtech air suspension kit for the 2017 and 2018 Honda Civic Si. The struts carry 36-way damping and adjustable lower mounts, and the air springs give near-infinite ride height adjustability. On the Civic Si, the factory adaptive damper will not function with these struts.
Air management is left out on purpose, since these struts are built to work with most air management systems on the market. The box contains a tool kit with spanner wrenches, damping knobs and brake line brackets sized for the application. The 2018 and 2019 Honda Accord are also listed, and on the Touring model the adaptive damper will not function there either. If you want control included, a complete KSport air system for this Civic Si is offered separately. Confirm fitment with the year, make and model checker, and recheck every air-line connection after the first 500 miles or one month.
Supported features
Designed for easy bolt-on installation and compatible with most air management systems on the market.
Near-infinite ride height adjustability from the air spring plus 36 levels of damping adjustment on each strut.
Crafted from high-quality metals and rubber compounds, proven to handle daily driving and track use, with superior resistance to road contaminants.
Fine-tune ride height at any pressure through the adjustable lower mount.
Compatible applications (3)
Choices for this system
Not included. These struts work with most air management systems; a complete KSport system is listed separately for this vehicle.
Installation
Professional installation is recommended. Modification to the OEM top mounts may be required on some applications. Recheck all air-line connections after the first 500 miles or one month, whichever comes first.
Air suspension setup and careWarranty & service
12-month limited warranty to the original purchaser against defects in materials and workmanship. Racing use, exterior finish and improperly installed or modified parts are not covered; keep your original invoice for any claim.
Warranty terms and service requestsOther published pages for MPN CHD421-ASO
These page names share this MPN; they do not confirm fitment. Verify your vehicle before ordering.