They are progressive but IMO they are a lot better on track than the stock springs. Besides lowering the car and CG there is less body roll and brake dive which for me means greater confidence tossing the car around a track. Which Eibach springs does he have? The P springs have a similar drop to the ProKit and the K springs are similar to the Sportline springs.CoolTechLLC said:Rick, are Ford's P-springs progressive? I'm pretty sure that the Eibach's are. I like progressive a lot for the street but I've spoken to one owner with the Eibachs and as much as he liked them for the street - he really DISLIKED them at the track and is in process of going back to OEM. (Just one person's opinion.) What's your experience?