Many auto-repair shops have a catalog that can search for parts for your vehicle make. If buying online, look at the intake Specifications for your vehicle so you get an intake that pulls the right amount of air in. If it pulls too little, you lose hp. Also, the different size adapters for different vehicles matters, so you have to have the correct piece of you will need to retro-fit. Hope I helped!
Why do they call it a cold air intake when it intakes air from the same damned spot the stock intake does?
You open the hood and look for the one that Subaru spent tens of thousands engineering for your specific car. It's really that easy.
Edit: So that $10 box doesn't take air from outside? I guess Subaru's are all crap then, and GM is way better? They figured out that cold air from outside the engine bay was better way back in 1981! Sarcasm aside, you don't think that box is designed to provide the proper amount of air, the proper velocity through the MAF, maintain a warranty, AND increase passenger comfort by decreasing air inlet noise for that specific vehicle? You've got a LOT to learn if you think that manufacturers just slap a piece of junk on their cars that some aftermarket company can vastly improve on for a couple hundred dollars.
I want to get a K&N cold air intake for my 04 Subaru Outback. But the K&N website doesn't let me search for intake systems for my car. It only shows what replacement filters I can get. How do I search for what intakes would fit?