I think(from what I understand) $18 is a "bag-o-rings", different sizes and stuff. It's overkill, but will eliminate any guesswork and will have plenty to spare.
As for doing it myself, I would love to! But, I don't have the space to do it nor the tools. Plus I want to make SURE it's done right. I plan on printing out that Tone instructions and giving it to the shop, but I'm sure it comes with the kit.....hope.

I started a new thread, a checklist if you will....

http://www.vehicross.info/forums/sho...&threadid=3341