I was cross referencing Eibach Springs between the Si and RSX, the part numbers looked very similar but they quoted a much larger rear drop for the RSX 1.4 inches on RSX compared to 1.1 inches on the Si (this was for Pro-Kits), found that strange, especially since the front drop was very similar and less than the rear drop. Maybe the RSX has a much higher rear end than the Si which may be the case when I think of it.
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