I have a set of KW v3 coilovers for sale. These came off of my G37 but will fit 370z. Top hats need to be replaced with your stock top hap hats from your OEM struts. The G37 top hats DO NOT fit the 370z.
One of the bump stops is worn on the front strut so you can have them replaced or used them as is. I've contacted KW about it and they are $9.99 each.
$1300 plus shipping and paypal
Worn bump stop