What is this and how hard is it to replace? How much..? Thanks

 

Tie Rods are pretty easy to replace.These are the rods that connect the center link to the steering knuckles at each front wheel.On each side, there's an inner and outer rod, connected with an adjustment sleeve.Usually it's the outers that wear out first,so it's probably a good idea to replace both outers at least.
Before removing anything,measure and write down the overall length of each one.This'll allow you to get the alignment close until you can get it to an alignment shop.
If you're just replacing the outers, you can disconnect them at the steering knuckle and loosen the adjustment sleeve.This will allow you to twist it out of the sleeve.Screw the new one in the same amount and reconnect at the knuckle.
If you're replacing inners and outers,you'll need to disconnect them from the center link as well. This can be difficult,but is easier with an air chisel and flat hammer-like attachment.
A lot of this stuff is difficult to remove, so be prepared to use some penetrating oil and some muscle.Try to avoid beating on stuff with hammers if you can do it another way.There are specific seperator tools and presses for this,but some of them aren't cheap.
If you're buying front end parts, Moog is the best stuff, and it's priced reasonably.
Summit carries Moog now, if you want to mail order.
-Rich-