CV Joint Boot!
I've posted a couple of other things that i've taken from different websites but its usually because i am doing the same thing on my car. Like this weekend i am replacing the inner cv joint boot and i found this post really helpfull, after this weekend i'll tell you how it went.
One thing to keep in mind, some times the base of the cv joint that screws into the thing that makes the wheels go round is squared, and also the rubber boot has the big end squared as well. The common cv joint boots that you buy in the auto parts for replacement are round. Quick tip if the square part of the cv joint boot your are taking off is still intact, you know the part where the clamp goes over and ties it down, just cut it and run the new boot over that part of the old boot and clamp it righ there.
Or you can just call the dealer and see how much the original is worth, if you have canged your cv joints to after market and they are not OE, you dont have to worry i think they come whith the round boot end, so the auto part boot would work just fine.