I'm not sure this will help at this point, but I installed a set of H&R springs on my 2010 Roadster a few weeks ago. Though I don't remember exactly what it was, but there was a dash and an additional number at the end of the part number that supposedly indicated they were for a Roadster. I have no information on the spring rates, but they did seem a little stiffer than stock. The problem I had with them is they dropped the car too much. I could barely get the thickness of my fingers between the top of the tire and the fender. For clearance sake, I had to run too much negative camber and personally, I don't care for the hellaflush look. It's great on Joe Blow's Civic, but it's not for me. They stayed on the car a total of 3 days and I went back to stock . As far as I'm concerned, it was a lot of work for nothing, except I got that whole lowering my car notion out of my head. I wish I had taken pictures, but sadly they didn't stay on there long enough for any. As far as the springs go, they seemed fine. Just personal preference.
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