I just finished lowering my car and while I was doing it I noticed that there was a little foam piece inside the sleeve that covered the strut. Do I need that foam piece inside the sleeve or is it ok to leave it out? A friend of mine said that it would be fine if I left it out but I'm not too sure. I was only lowering the front 1.75" and it looks like it was lowered 2". Could it be that I should've put the foam inside the sleeve?