After a few hours of revised Z springs research, I came to realized a few things...

1. The so called "revised" springs ONLY applies to the rear springs as the front springs for all 350z and G35 springs remain at the 314 rate, with 350Z lowering the G35 Coupe by an additional 0.75".

2. The revised 350z only lowers the front by 0.75" for a 05+ Coupe WITH Sport suspension while the rears did not lower at all. Based on this, and the Spring ratings, I realized that the revised rear springs on 350z are the SAME springs on the 05+ Sport suspension Coupe (i.e. Infiniti used the same springs for Sport suspension and revised 350z and utilized the tall spring mount to keep the height)

So to summarize... For a 05+ G35 Coupe with Sport suspension wanting a small 0.75" drop, you can pick up ANY 350z FRONT springs (as they were not revised) and keep your 05 + G35 coupe with Sport suspension rear springs.

Further, to achieve a 0.75" drop all around, you can simply cut the rear spring mount by 0.75". Can anyone confirm if this is true?

Source:

Oem linear springs
G35 coupes with oem 17’s & 18’s
G35 sedan’s with sport suspension
350Z’s 2003/2004 (unrevised)
Front:314 Rear:342


Oem linear springs
G35 coupes 2005/2006 with oem 19’s only
350Z 2004.5 to 2008 (revised suspension)
Front:314 Rear:427

https://g35driver.com/forums/brakes-...w-updates.html



Thanks!