I'm planning on buying lowering springs for a 2005 g35 coupe 6mt Should I go with eibach Pro Kit or Tein S-techs? even drop? ride comfort? need some advise...

 

IMO the Pro-kit makes more sense since your car has the legit sports suspension. The Tein's use a really soft rear spring of 274lbs vs what your car was delivered with, 427lbs.
I'm just not thrilled about the spread they have between initial and final spring rates, but honestly, you didn't mention car feel or performance. The spread should help the ride comfort though.


Eibach G35 Coupe progressive springs 1.1”/1” drop on G35 coupe
Spring rates in LBS initial/final front 229/337 initial/final rear 274/463

Tein S-tech G35(fronts are progressive, rears are linear) coupe drop 1.2"/.9"
Spring rates in LBS 358/274 (final rates only, softer intial front progressive rate unknown)

Oem 2005 coupe 6mt (sport suspension
Spring rates 314/427

Another thought

RSR 350Z linear springs .6”/.6” drop on 350Z G35 coupe drop should be around 1"/1"
Spring rates in LBS 345/417

 

Either get Eibach 350z Prokit or Tein 350z S-techs. I have the 350z S-techs and they ride and feel like stock.

Eibach 350Z progressive springs 1”/1” drop* on 350Z G35 drops will be higher
Spring rates in LBS initial/final front 296/384 initial/final rear 316/421

Tein S-tech 350z (fronts are progressive, rears are linear) .7”/.6” drop on 350Z G35 drops will be higher
Spring rates in LBS 386/402 (estimated front intial rate is 327lbs)

 

^ I didn't recommend the 350z S-tech's because he mention's ride comfort and doesn't mention performance. Glad to hear you like the ride on them, going much higher then oem rates isn't something that I recommend for those that ask about ride comfort.

 

Tein!!!

 

I think I'm gonna go with the pro-kit but should I go with 350z or g35 springs as long as it feels like stock I'm fine I've seen a few pics of g35s with pro-kit and the drop is perfect.