In the past I've contacted them about their sport springs for V36 and they're listed as the same part number as the V35. While they obviously work, the 07-08's have stiffer spring rates with every other manufacturer I've found compared to the V35 sedan's. I'm sure this is the reason why the V36 on H&R's is dropped significantly lower than their 1.3" claim in front. When I called about this, the lady on the phone said the part number listed for the 07-08 was a mistake and they aren't compatible with the V36's, which is obviously wrong...but she made the statement quick like she'd had to explain this before. This was probably almost a year ago and the website is unchanged.

So now they have the 09 G37 sedan listed as a different part number, so I assumed they redesigned them for 09 and this would be what we'd want to use on the 07-08 G35's.

They are making me wonder if there's anything different with the G37 sedan's spring rates that would make us not want to use their new springs on our G35's... Whatcha think?

http://hrsprings.com/scripts/appguid...ind3&MakeID=15

 

The 37 itself is a little heavier (not by much), so the spring rate may be a little higher to compensate for that but I doubt it.

 

I was wondering the same thing. I don't think they changed anything for the v36. Which is the reason why it drops the car a lot lower then they advertise. I also don't think there is any difference in the suspension geometry of the 09 sedans

 

Well I've read that the 09's, being heavier, do have different spring rates so the advertised drop for 09's would probably be less on 07-08's. Being as the weight was all in the nose, I'd guess you'd end up with the same drop on the rear and the nose sitting higher, aka saggy ***.

So I guess H&R just didn't care enough to put in the effort on the 07-08's.