I believe that the rising rate springs with the tuned Bilstein dampers (& threaded shroud & std thrust race) will be around £595 + VAT retail from dealers/specialists, but there may be offers I guess.
Absolutely will need to fit the supplied Bilstein dampers [tuned at Bilstein UK Tech Centre] to match the springs.
Dampers ALWAYS need to be tuned in bump and rebound, slow and high speed, against any significant change in spring rate. Why would one want to do otherwise if one wants the full benefit of improved ride and handling?
NB I do not want to run the risk of sounding as though I am advertising here, so if you wish to discuss this product in more detail before the imminent release then you can find my contact on the MSCC website under the technical contact details for CVH or if you know me just call. PJB.
PS The Zetec 2.0 litre makes a nice swap for the CVH......


4/4 2.0 Zetec SSL front and rear