Yea... the issue is that shocks/struts are made to move a certain amount in their normal operation. When you install lower springs, the range in which the car will move up and down in response to things like normal driving, bumps, etc is reduced, thus reducing the free range of the shocks/struts. This can lead to excess wear and premature failure for shocks which are operated in a range where they weren't meant to stay at all the time.
I'm not a car guy either, I'm still trying to learn myself
btw,
www.trdsparks.com and
www.mcgeorgeparts.com are two places the Scion community (are you on
www.scionlife.com? If not, come on over and join us!) uses to get OEM parts much cheaper than your local dealer (even though those two websites are dealers themselves). TRD parts are also available there... you're looking for the TRD springs and shocks struts (if you decide you want them). Otherwise I believe the springs will run you aobut $155, which isn't too bad at all.
here are the springs -
click
shocks can also be found on the page
or you can get the "package" deal
click
If you would like to improve handling you can also get a TRD rear sway bar. I would like to do this upgrade but all my money has disappeared for detailing supplies
