After reading this post I went out to my garage and looked to see if my car had them. To my amazement it did! I jacked the car up and removed them in 5 seconds. It brought my front end down 3/8". I bought the car new in 2009 and it's always serviced at the Nissan dealership. I can't believe the dealers not aware of this. Looks like I'll be calling them tomorrow.
http://www.the370z.com/images/icons/icon8.gif