Just got my Bilstein 5100's in the mail today. I will be doing the install myself. One thing I found a bit perplexing. The box containing the rears had no bag containing new grommets or washers. I read another post on here detailing the rear install and he mentioned grabbing the grommets and washers out of a bag. Were the grommets a separate item I should have bought. Or do I reuse the ones on the stock shock. I appreciate any help.