TT:
I am pretty sure that the Vibe comes from the factory on KYB's. That's what I learned from several posts, here and on the Toyota forums. That would be the standard KYB's not the GR-2. Go tot he KYB website to learn the difference.
Just to nail down a price is hard work in itself. Typically you replace the strut and the strut mounts together. Most of the time you can reuse the dust bellows and the lower and upper spring isolators
(BTW: they are struts, not shocks. The difference being that the struts carry the springs and are the top anchor points for the suspension to the body and thus are involved in steering and control of lateral forces, where as shock absorbers don't. They only dampen the spring action of the suspension. But a lot of people use "shocks" as a generic term for both types.)
If your Yaris still sways too much consider beefing up the front sway bar. But not too much or the inside corner wheel will slip too often: the rear sway bar should be harder than the front sway bar in front wheel drive applications.
My approach for the Yaris would be:
1. upgrade the struts (Tokico blue if available)
2. beef up the sway bars
3. lowering springs
4. urethane suspension bushings
5. slow down
If you knew your endpoint when you will be happy you could achieve it the first time. If you do it step by step you will incur the same basic job several times. Every time you mess with the anchor points of the suspension you have to do an alignment. Only changing the sway bars does not require an alignment. Since you have done the rear swaybar already you may opt to beef up the front sway bar as a 2nd step. If that's not doing it you will need to yank the struts.
But I have to make a point here: I have not modified any of my vehicles for performance ever, except my moped 45 years ago. Therefore everything I say in this regard is accumulated theoretical knowledge.
Here is a link to an exploded view of the assembly:
http://www.microficher.com/2006-toyota- ... -diagram-2" onclick="window.open(this.href);return false;