Ape Factory

iTrader: (3)

All the new Tanabe dampers are made by KYB so you're getting quality stuff. They all will lower the car but it's a very small drop, 1/8th to 1/2" range. The exception is the Z40 model (which doesn't list a G37 variant, only a 370Z version) which drops an inch in the rear. Spring rates are all 10f/8r, nice bump over the base suspension and equal to the IPL's rates.

slartibartfast

iTrader: (7)

Where did you find the IPL OE rates?

Ape Factory

iTrader: (3)

9.8kg front, 8.02kg rear. Courtesy of Eibach.

http://eibach.com/sites/eibach.com.m...13_pro-kit.pdf

slartibartfast

iTrader: (7)

Ahh, you got lucky. The older models don't have spring rates listed. I'll add your info to the RWD coil-over sticky. And it makes me think my idea of 11kg/10kg a good idea for a firmer yet decent ride for my sedan.