Hi steve, I just wrote a note to a fellow visiter, if you can find more info on 850's than is commercailly avalible, let us know the dealer can only give us numbers as to what was originally delivered on the car depending upon the numbers on the plate under the hood. I tried to find out spring rates of the
T5-R all they say is "we can tell you that the springs were part numberX " far from good enough. They will say the same for the shock rates "partX" Good luck, Drifter.