The Meteor Caterham Progressive Spring KitThis upgrade option when buying a new set of suspension has been developed after further testing and development of our original kit. The Meteor Caterham Progressive Spring Kit is now a Single Eibach Spring made exclusively for us to our own specification. The Eibach springs allow superior road behaviour as well as allowing trackday use. The Meteor Progressive Spring Kit improves traction, ride and stability.We would though recommend it is used in conjunction with our own spec dampers for best results.We generally only specify the progressive spring for RWD Rear axle use.� The price indicated is for the 2 rear dampers.Remember to ask about this when discussing your new suspension.