The Eibach Sportline Performance Spring greatly improved my automotive performance! Based on my observations, it provided a sleeker and lower stance on my car while delivering better handling and control on the road. The increased spring rate also made for a more comfortable ride even on rough surfaces. The only downside is that installation can be somewhat tricky if you're not familiar with suspension systems. Overall, I highly recommend the Eibach Sportline Performance Spring for anyoneβ¦