2 Eyes nuts and bolts. If you use the Rev Tent to sleep on a Front Runner rack, you will need 6 mounts in the Sleep and Transport Kit. Just to transport the Rev Tent, you only need 4. So you save a few bucks if you only use the rack to move the Rev Tent from A to B. 

NOTE:  The Rev Rack Tent includes the Transport & Sleep mount kit for Front Runner Racks.  Just choose the option when purchasing.