ok, I see what you are talking about. So the KW shaft is thicker than the oem shaft? Drilling out that dished washer shouldn't be a problem. FWIW, you have to do that on koni applications if you have a honda/acura, as the koni shaft is larger than the oem. As long as the parts move freely like before, and you don't have excess slop, you should be fine.
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