Actually Im pretty sure the SI swaybar is 13mm thick. Thats not a bad price, but I would look into a Skunk2 swaybar. Its 21mm, comes with everything you need to bolt it right up like the stock one would.
I have the skunk2 swaybar on mine. It feels great. That tiny SI swaybar wont make much of a difference.
Edit: Sorry I just read your sig. I guess the SI swaybar is better then nothing.
Check out my post about swaybars at the bottom of this thread.
http://www.hondastyle.com/forums/sho...&threadid=2524