I just installed some height adjustable Bilstein's on the front of my '98 Tacoma today and noticed that there were no rubber coil spring isolators on the upper coil buckets when I removed the RevTek spacers. The struts and spacers came off my friend's '03 DC when he went to c/o's and went onto my truck since my struts were shot. I actually helped install the RevTek spacers on his struts years ago, but I don't recall if there were ever rubber coil spring isolators on there and if they had to be removed. I also installed height adjustable 5100's (front) and 5125's (rear) on my neighbor's truck today as well, and she did have rubber coil spring isolators on her stock struts. My truck seems to ride well and doesn't seem to be making a lot of noise. Do I even need them? Any input? If I do need them, does anyone have any lying around?