So I just bought some Roush springs from BlackcatN20. (thanks btw) And after a lot of searching I couldn't come up with any spring rates for em. Nobody knew, people guessed, and people said Roush didn't know or didn't want to tell. Well I thought I would try my luck and email em. I will just post the email.
"I have a set of Roush springs for a 00-05 Focus. They are blue and I believe the part number is R06000002. I was wondering what the spring rates of these springs are. The rear springs certainly appear progressive whereas the fronts do not. I would really appreciate the info. Thanks a lot
Here are the spring rates for the front and the rear:
160 lbs/in front
188 lbs/in rear"
This was from firstname.lastname@example.org
So it seems the spring rates are above. Just thought I would let ya know and perhaps we should update the suspension reference thread with this info.