I have a 1996 impreza outback and just bought some forester struts and 4 grabber tires size 215/65-16 I tried putting them on. the fronts went in with no problem but the rears hit the bottom of the strut. so since I was unable to fit them with my stock suspension I decided to throw on the fozzy struts. from my understanding fronts will bolt right in and im planning on changing tophats on the rear. this is where I am a bit confused. people say that they used some sort of washer to bolt the top hat and strut back together. can I use any kind of washer or is it a specific one?