Mobile home transfer/gift tax to family member in San Jose, CA?

[Hau N.]

Hello BP members,

My parents live in a mobile home in San Jose, CA. It is owned free and clear under my sister's name; however, she would like to transfer the title to me.  There is no exchange in money involved as we consider the mobile home belongs to our parents.  Is there a transfer or gift tax?  I searched on CA Department of Housing but didn't see any fee/tax involved in the transferring title between family (http://www.hcd.ca.gov/manufactured-mobile-home/registration-titling/buy-sell-transfer.shtml). This sounds too good to be true.  

Thanks in advance.

Hau