i cant remember if i used the spacers when i installed my HD's but i think i did.
you should be able to measure the old strut tube and the HD's and determine the answer.
or call bielstien, i called them and got some kind of tech when the strut tubes wouldnt fit properly.
good luck
mike

I don't think I used spacers in mine, but I can't remember. I do know that when I was building the coilovers, I had one strut tube with a spacer, and one w/o. I never put spacers into the tubes when I installed the struts, so I assume that they're not needed.

Use the blue dust boots that come with the Bil's. They have internal bump stops, so you don't need to add one. I run mine w/o dust boots, because they don't fit with 2.5" diameter springs. Since they're inverted, I don't think it matters if they are exposed to dirt.
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forums.turbobricks.com

You will have to let the fit tell you. I have openned up cars with zero, one and both sides spacered. In my turbos, I had to use spacers for the Bils (talking HD here exclusively so far). I can't think of a case where I did not use the spacers with Bilstein HDs in any of the 240s, turbo or not. What you do not want to do is drive a car that needed spacers, but does not have them.

The Bilsteins won't go in with the spacers in place.
The stock boots and bump stops won't fit.