Something along the lines of 1/4 braided cable with a couple cable clamps would be cheaper and would stand up to more heat cycling than the nylon would. That's the setup I run on my Ford seeing as how it has more mount issues than the X. I've run my Xterra through the same stuff that I blew a mount out on the truck in and it just kept huffing right along. As soon as I lost one mount I had both sides cabled in. Once I lose one on teh X, same same.

Justin