Would the SVT contour springs and kyb shocks do anything in terms of ride height/handling of a 01 cougar 2.5?
Are they even compatible? I was under the impression that they're completely different.No.
The stock Cougar springs are already essentially SVT spec to begin with.
And KYB struts are not much different from Cougar OEM struts.
So unless you're replacing worn out parts, you won't see any change.