An oiled K&N is not a good idea on Subarus. I know a few people have used them, but you need to used the oil sparingly and if you over coat the filter, your AFM is going into the bin in the very near future.

Get on ebay and get a Apexi Pod. Flows better and filters better too. Plus its only like $110 delivered to your door.

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RS Liberty - Because WRX's are only good for parts...