There should have been a beveled washer/tapered washer on the old shock too, as long as you reused it you'll be OK. It is pretty important because it holds the weight of the cup washer. Without the beveled washer the the cup washer puts all its force on the cap of the strut housing end. I guess all things being equal the forces will be distributed the same on the strut housing end. Bilstein does send it so that the old one doesn't have to be used.
Also my 2000 'S' original struts did have it.
Last edited by WhipE350; 04-27-2011 at 03:07 PM.
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