can g35 sedan tein s techs work on my 04 g35 coupe?
What will the drop look like? how about the ride quality?

 

Yes, dont do it. Softer rear end spring rate. will only drop your car .2" and .3".

Depending on how low you wanna go...

350Z S-techs 1.3"F and 1.2"R (stiffer than coupe)
350Z H-techs .8 F and .7 R (stiffer than coupe)
Coupe S-techs .7F and .6R
Coupe H-techs .4F and .3R

I think you need to go at least 1" to make it look good. I would go with the 350Z S-techs. I'm rockin the Tokico HP and 350Z H-techs on my sedan. Good drop.