Varient 2 coilovers are designed for the more experienced drivers who prefer to set their own damper rebound rates when changing ride height. This set of four coilovers offer infinite adjustment of shock rebound damper rates to regulate vehicle pitch and roll behavior for ride comfort rather than a fixed number of choices. Get yourself this part here at Trinity Autosport. We offer fast shipping and excellent customer service for your 997 (2005-2008) Porsche. If you have any questions feel free to call us.