[/quote]
Nissan did not change the spring rates between the Z, G coupe and the G sedan with the sport suspension. They are all 314/342. And this is even with different springs, Nissan munipulated the springs wire diameters, active coils and made slight changes in outside diameters to keep the rates the same. I would place money on a bet that the roadsteer does not us spring rates that are different then the Z coupe.
Part of the 2004 coupe's suspension revision is the rumored change in spring rate. All roadsteer's from job one have the revised shocks.
If anyone in the lower 48 is willing to send me one front and one rear oem roadsteer spring, I will confirm the spring rates and return the springs to you within 48hours, I'll pay for the return shipping.