I assume you are talking about sway bars. In any case, you would do better to go to the Handling, Suspension, & Brakes forum, than here.
I recently installed a Toyota TRD sway bar set for a Matrix on my '04 base model. Its a lot of work. You have to drop the front subframe to install a new front bar.
The TRD set is made by Hotchkiss for Toyota, probably why it was removed from the Hotchkiss catalog.
I documented the installation in this thread.
viewtopic.php?f=26&t=38341
Charles