So I recently dropped my 06 coupe on 350z H-techs and i love the drop in the front just wish the rear looked the same as well. I had the factory sport-tuned suspension with which had spring rates of: Front:314 Rear:427 the 350z H-techs have spring rates of: Front:358 Rear:375 (listing for reference)

Now i can really feel a difference in the lower spring rate in the rear. It makes it seem a little bouncy when compared to the stock suspension. I have about a 1 finger gap in the front and 2 finger gap in the rear. Now i know the spring mount mod would easily fix this problem, but what about the bouncy ride of the rear?

I am thinking about running 350z S-techs in the rear and keeping the H-techs in the front. this would give me a spring rate of 402 in the rear and would even out the drop as well. I'd like to hear some of your views on mixing springs and how you think this set-up would perform.

EDIT: another option i just thought of would be to put the stock rear springs back in and do the spring mount mod to even things out....what do you think?

 

I originally had sports suspension on my 2006 too, after switching to 350Z h-tech, the ride felt much smoother. Springmount mod you can cut up to 3/4".