Many other sites have info pages with up to date info on what mods are available, what kind of performance gains could be expected, general pricing, and links to places where they can be purchased. Here is an example. Click on any one of the performance parts you are interrested in and there you have it.

http://www.neweclipse.org/mods.htm

2004 Sedan 6MT
Silver/Graphite/Premium/Aero
HuperOptik Ceramic 50/Clear Corners/XM Radio
Z-Tube/Stillen High Flow Airbox/Grounding Kit