I had rear camber arms/toe bolts from SPC I think. You don't need them but you won't be able to get back in specs without them. You'll need an alignment afterwards.

Hey that post was from over a year ago.. I no longer have the G but it dropped it just over an inch (they were 350z s-techs). I thought it looked great, but I'd definitely buy coils if I could do it again. I ended up buying s-techs and tokico d-specs and I didn't have ride height adjustment to get it to the height I wanted, so I'd reccomend getting some good coilovers if you have the funds.