Tein 17-21 Honda Civic Si (FC1/FC3) Flex Z Damper Kit Coilovers

If you're looking to dial in the stance and handling of your 2017-2021 Honda Civic Si (FC1/FC3), this Tein Flex Z damper kit is a solid option. These coilovers allow you to significantly lower your car's ride height while also providing a wide range of adjustments for damping force, letting you tune the suspension for everything from spirited street driving to track days. The Flex Z series is designed to offer a noticeable improvement in cornering performance and a more aggressive look without breaking the bank.

Tein has built these coilovers with durability and adjustability in mind. They feature a full-length adjustability system, meaning you can set the ride height independently of the spring preload, which helps maintain proper suspension geometry and ride comfort. The damping force can be adjusted across 16 levels, giving you plenty of control to find the perfect balance between a firm, responsive ride and everyday drivability. The internal structure uses Tein's advanced twin-tube system, which is well-known for its consistent performance and reliability. These units are also rebuildable, so you can service them down the road to keep them performing like new.

This kit is designed as a direct replacement for your factory suspension components, making installation more straightforward. You'll get a complete set of four coilovers, ready to bolt on. While these offer a significant upgrade in adjustability and performance, remember that lowering your vehicle can affect the factory alignment specifications, so a professional alignment after installation is highly recommended to ensure optimal handling and tire wear.