If you want to improve the handling of your 06-10 Honda Civic Si and save money on a batch of proven performance parts, the Sport-Plus kit is for you! The Eibach Sportline springs will greatly improve handling with an aggressive drop that is perfect for a daily driven car. The reduced wheel gap will make your car look the way it should have come from the factory, and the lower center of gravity dramatically helps in the corners. The Sportlines feature a progressive spring design for the ultimate mix of comfort and performance. The included Anti-Roll Kit further reduces body roll and allows fine-tuning of your vehicle's suspension. The goal is neutral, predictable handling. Cold-formed from high strength aircraft grade steel, the anti-roll bars are carefully designed to fit your vehicle without modification.