I've currently got a full 06 350Z suspension set-up on my 06 6MT Sedan. Interested in going slightly lower and like the drop available with the H&R sport springs (1.3/1.2).

I'm curious as to how these would work with the 350Z shocks? Since the the 350Z shocks are shorter than the sedan shocks, I assume they would handle the drop sufficiently. But how about the spring rates?

Thanks for your input.

They will be better suited because of thier shorter overall lengths and unless the springs are on the weak side, the extra dampner control they have won't hurt either. Keep in mind that your trading linear springs for progressive springs, which does carry a price as far as at the limit handling goes.

H&R refues to give out spring rate info. Only reason I have the 350Z H&R spring rates is a employee talked a little too much to a 350Z owner that thinks like I do.

Thanks for the input. Not knowing the spring rates was my biggest concern.

Any thoughts on the Swift springs for the coupe? These are rated at 1.0F/.6R for the coupe so they'd be a drop of 1.5F/1.1R for the sedan. I ran Swifts on my EVO VIII and loved them, best springs I'd ever used. However, the rates for the G35 application are lower than stock.

Because of the coupe Swift springs being softer then oem front and rear, I don't recommend them unless you have specfic reason to want softer then oem springs. You can go with RSR 350Z springs and get a simular drop as the coupe Swift springs, but with better spring stiffness for performance sake.

RSR 350 linear springs
345/417
G35 sedan drop 1.6"/1.6"

You can make your own shims to slip above the oem rear upper spring seat to limit rear drop, so if you'd rather have a 1.6"/1.3" their's no reason why you can't accomplish that.