http://hybrid2.honda-perf.org/tech/ITRon6G.html

You'll need SI endlinks. But make sure you get Beak's kit if you do go with the ITR sway bar.

Honda Part #s for 2000 Honda Civic SI Endlinks
LINK ASSY. R. RR. STABILIZER 52320-S04-003
LINK ASSY. L. RR. STABILIZER 52321-S04-003