Replacing the air filter with a k&n cone filter

[David Clarke]

Good evening guys.

I have a 2009 Subaru Impreza wrx sti 330s 2.5L and I've been thinking about replacing the standard panel air filter with a K&N cone air filter, could anyone advise if this is a good or bad idea and if so is there something else I could do instead to upgrade the air intake?

[ROSSCOSM]

Ask most subaru fanatics and they will tell you its pointless unless your going for “big” power amd it really needs mapped in. A good solution is to just throw in a better panel filter that firs the original air box like cosworth/ k&n ect

[David Clarke]

Okay cheers, been doing some research and that’s what most sources say also so think I’m just gonna do that.

[ROSSCOSM]

Its a cheap alternative mate then if you go down bigger power route in future you can go cone filter.  

[Jay762]

What he said 👍