Please help me identify this
 

hey guys! been a long time since i've been on.

i crawled under my truck today to change the exhaust manifold gasket because i saw it was leaking and noticed on the front passenger side one of the boots had burst, and grease had leaked out. Im not super knowledgable on the vehicle repair subject; can someone identify what the heck i need to replace?

http://i25.tinypic.com/11t7t51.jpg

thanks a ton.

Outer tie rod end