I have a question I'm trying to lower my g37 coupe and have my wheels tucked in but the rear set of wheels will have a negative camber on it with a rear camber arm. If i wanted to tuck in my front set of wheels will i need to get front camber arms too or just the coilover? something similar to this

 

I'm sure he's on air.with front camber arms and rear camber bars.his wheels aren't even that agressive...

 

Yep, if you're planning on having that much drop without air you won't be able to drive it.
Your camber will keep increasing as you drop so depending how low you go you might get the tuck you're wanting. I'd try it and see, you can always add the arms later.