I have an 04 g35 coupe with 18 inch wheels! I want to lower the car about an 1.5 maybe just a bit more to 1.8. I love how it rides and handles! I don't want to lose ride quality! Also some springs that wont change camber much! What would be the best lowering springs so i wont lose the ride quality or change my camber? Thanks Josh

 

There are no springs that will lower any car that much and not affect the ride quality and not need a camber kit.
The ride will be much stiffer and there will be considerable negative camber with that kind of drop.
If you want to maintain ride quality but still lower over 1.2 then higher end coilovers would be the answer but they are bank!
Or if you're on a budget you could run just aftermarket springs and a rear camber kit.

Link to spring rates and lowering amounts:
https://g35driver.com/forums/brakes-...w-updates.html

 

Forgot to mention most people that want a modest drop without the hassle of using a camber kit like the 350Z Tein h techs.
They have a better spring rate than the ones made for the G.
Usually you can still stay in oem spec for camber because the drop is mild - see link above.