well maybe they dont have em then, as i remember if you get say a 25mm lowering kit there should be a bump stop which you have to cut 25mm off on each strut however i have fitted the gmax kit to a couple of different cars now so maybe that was for another car. Check the instructions that came in the box there should be a slip in there, i think its yellow. That will tell you if you need to trim the bump stops or not. Your best bet is to read the instructions and see if anything was missed. Best of luck pal. Also everything you need to fit should be in the kit so you wouldnt need to take anything of the old ones and put on the new ones.