Replaced my cabin and air filters.
AEM DryFlow Air Filter
It may just be all in my head, but after replacing the air filter it seems as though my car is more responsive when getting on the throttle.
Also I have a question for you guys. I have a 2010 impreza 2.5i, is there any difference between suspensions on the 2.5i platform or are they the same since 08?
If they're the same, I may try and upgrade to 09+ WRX struts/springs in the future.