Height adjustable Pro-Street-S kits offer a very sportive driveability without sacrificing too much comfort. Height adjustment means the car is exactly at the height you want, and is extremely useful on cars used around the year - you can rise the car up to normal height for the winter and drop it back down for summer.
Air suspension kits offer a comfy ride with heigh adjustment available at any time. Air-kits are road legal, model specific and are bolt-on installable.