it's been discussed before and it would be one of those things you would have to try out yourself, however the Evo X does look to have a higher stance than a Evo 8/9 and thus might make our cars just look the same or maybe even more of a monster truck. click
And reference to this thread of the various spring sizes
I had a 1g dsm friend ask me the same thing as he had acquired a set of Evo X stockers.
Here's a pic of them, now I know for sure those rear springs are definitely much taller than the Evo 8s I have on my car. Let's see what the Veterans say. My friend said the rear springs are within a inch of the same height as his stock springs, to me that would mean there wouldn't be any difference in height then, correct?