Not sure if these sites are general knowledge, but I figured I'd share anyway:

OEM Honda parts:
www.hondapartscheap.com

OEM Acura parts:
www.oemacuraparts.com


OEM parts for a 2013 Civic Si:
http://www.hondapartscheap.com/parts...6-speed-manual

OEM parts for a 2013 ILX 2.4 Prem:
http://www.oemacuraparts.com/parts-c...6-speed-manual


The sites have pretty cheap prices for OEM parts. Another interesting use though is the ability to compare car's parts directly by OEM part number to find compatibility between the Civic and the ILX.

For example, one interesting finding I've noticed form this is that the ILX 2.4 appear to have the same end links as the 2013 Civic Si (ILX vs Civic). I think this is contradictory to what I've read elsewhere in this forum.