Pro Kit 2017-21 Honda Civic Si

The Pro Kit 2017-21 Honda Civic Si from Eibach is a comprehensive suspension upgrade engineered specifically for drivers who demand sharper handling and a more planted stance on street and track applications. Built for the 10th-generation Civic Si platform, this kit addresses the factory suspension's limitations by delivering measurable improvements in cornering grip, body roll control, and overall chassis balance. Whether you're a weekend autocross competitor or a street enthusiast looking to transform your Si's dynamic character, this suspension system provides the foundation necessary to unlock your car's full potential.

The Pro Kit utilizes precision-engineered lowering springs and matching dampers calibrated to work together as an integrated system, eliminating the compromises inherent in piecemeal upgrades. Eibach's design philosophy focuses on maintaining ride quality while reducing body roll through optimized spring rates and damping characteristics tuned for the Civic Si's lightweight platform. The kit's geometry is engineered to preserve proper suspension travel and prevent premature tire wear, while the carefully selected spring rates prevent harsh bottoming-out during aggressive driving or spirited cornering. Weighing 21.16 lbs and engineered to exacting specifications, every component is designed to work harmoniously with your stock steering geometry and brake system.

This suspension package delivers the greatest benefits for 2017–2021 Civic Si owners who combine street driving with periodic track days or autocross events, as well as enthusiasts seeking a noticeable improvement in handling without sacrificing everyday drivability. Installation typically requires professional alignment and baseline setup to maximize the kit's potential—many mechanics recommend corner-weighting after installation to dial in weight distribution for your specific driving style. The comprehensive nature of this complete kit simplifies the upgrade process by eliminating compatibility guesswork, ensuring all components are engineered to work together seamlessly from day one. If you're committed to transforming your Civic Si's chassis dynamics, the Pro Kit delivers measurable performance gains backed by Eibach's engineering heritage.