I put these on a few weeks ago:
Front Endlinks (WRX 02-14/STi 04-14)
Rear Endlinks (WRX/STi 08-14)
Get new endlinks on there ASAP in my opinion. For me they actually made a much more noticeable improvement than just installing the sway bars. Made me kinda angry at myself for not doing them at the same time 2 years ago, lol.