You're going to sag in the back, so you'll need spacers. Other then that you'll need your legacy top hats and a alignment. $399 is kinda high, find a set of like 04 (rebuild them cause of the clunk that happens) or a set of 05's. Get 04's for like 125 bucks and 05's for little less then $200. Don't use your Outback springs, as there will be zero travel.