I just installed my old Eibach springs from my 2008 G37s Coupe onto my girlfriends 2009 G37s Sedan. I know that the spring rates are different between the coupe and sedan but i read online that the difference between the G37s coupe and G37s Sedan Sport models curb weight is only a ~20lb differences.

As you can see from the pictures below the wheel gap on the sedan is more even with Eibach springs than compared to the G37s Coupe with Eibach springs.

Below are the pictures after installation: (Please note the trunk is fully loaded with luggage's, which is why it looks like the rear is slightly lower than the front)





















This is the spring compressor that i used to switched out the springs. Due to the close grouping of the coils its very difficult to compressor the Eibach spring with the normal autozone/advance rental spring compressor.

 

Looks great ! Did you change the shocks or adjust camber ?

 

Nope neither yet, I re-used the OEM Struts and i am waiting a couple of days until the spring settles down before we go get an alignment.

 

Another member "Paratrooper" used Eibach coupe springs on his sedan and the drop looked really good, just a bit lower than the Eibach sedan springs on the sedan, I'm a fan!