According to Roush, their springs were deisgned to be used with the factory struts. I think the roush springs for $120 is a pretty good price and putting on four Koni's is not feasable at this time. It's either leave factory or go with the KYBs. But the fact that KYB, and all the aftermarkets for that matter, don't differentiate between SVT, non-SVT, or anything. In the case of an adjustable strut, i can see how it can be adjusted for all applications, but if Ford thought it was necessary to use a different strut on the SVT than the non-SVT, I would think that one size doesn't fit all.
