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Message: <blockquote data-quote="ReplicaR" data-source="post: 1456913" data-attributes="member: 9209">I can just diagram the whole thing for you. From top to bottom you have: Coilover top hat, helper spring, helper spring spacer, coilover spring, bottom coilover perch. A helper spring has a very weak rate, and in order to be as responsive as possible you want it on top. Now, onto the actual application. Below is a crude diagram that I just whipped up in MS Paint. On the left you will see an actual part configuration. You will notice that coilover top hat and helper spring spacer have inner sleeve of the same diameter, which doesn't allow the helper spring to fully collapse. This doesn't affect the spring rate at all, because once the perch is resting on the helper spring spacer, it is as good as solid connection, and therefore is out of the spring rate equation. An ideal setup would have been where the inner sleeves would fit into each other and the helper spring itself was thicker once fully compressed, like diagrammed on the right, but unfortunately that's not the case. Having said that, while the scenario isn't ideal, it has been surprisingly reliable. The sleeves are resting on top of each other perfectly, so there isn't a scenario where it wears it unevenly, etc. It's been like this for the past 10 years with no issues, used on both track and street, so I don't see a huge deal with it. Hope this helps.<img src="https://i.imgur.com/PdCvbtY.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>