A quick reply:Yes,you must align after...springs came in on Friday from Tirerack,installed same day and car finished align/state inspection/emissions by noon Monday$400,did not scrutinize bill yet(son picked up car and delivered to my house).Bumps...smooth to moderate surfaces are better,,mod to rough are no forgiveness,undulations stiffer,corners like even more on rails.Will push it tomorrow.Pictures on weekend..Dealership loves it NO they did not do the work!Their Parts manager and best mechanic spotted the drop immediately...a stranger would not..close to a G35 in height...yes!