K&N air filter

by **RedDragon** » Sat Dec 27, 2008 4:28 pm

Does anyone have a K&N pod or pannel filter in their 2.5? Did you find a change in performance?

by **blademaster** » Sat Dec 27, 2008 5:19 pm

pod filters probably wont have much of a performance impact on N/As
to get more go out of an N/A, you need to do internal engine work

pod filter/intakes/direct piping/exhausts wont have much of an impact ( <1kw)

by **Arith** » Sat Dec 27, 2008 7:35 pm

blademaster's on the money. On their own, aftermarket filters do little for performance. Their usefullness comes in when you can recycle them by cleaning them out rather than chuck them out and buying a new one. They will add a bit of noise but you can save money buy removing the resonator for added noise. But when combined with other mods they become more effective.

by **XLR83N** » Sat Dec 27, 2008 9:49 pm

i just put a k&n panel in my 2.5i and havnt noticed any difference at all, no noise or 'power'. Mainly did it for the reuseability

by **overl0ad** » Sat Dec 27, 2008 11:51 pm

put a HKS one in my 2.5i, took out the milk bottle.

sounds MUCH better when you floor it.

can hear the induction noise.

but i'm pretty sure you can hear the insuction noise on the OEM filter, just by taking the milk bottle out.

by **XLR83N** » Sun Dec 28, 2008 9:28 am

sorry, might seem stupid, but whats the 'milk bottle'?

by **smythie** » Sun Dec 28, 2008 9:30 am

I was wondering the same. Can only guess the reference is to the resonator

by **Arith** » Sun Dec 28, 2008 10:03 am

Yup. It's a white plastic container that looks very similar.

But yeah, the main purpose Subaru put it in is to quieten the intake system for a more comfortable drive. Remove it and you get some decent induction noise.

Heh-heh, when EJ25 removed his and punted his 2.5i around a parking lot, I thought he got an exhaust because I could hear it quite clearly.

by **smythie** » Sun Dec 28, 2008 10:43 am

hmm, might have to pull mine apart and see what I can find

by **XLR83N** » Mon Dec 29, 2008 9:17 am

do you need to remove the bumper to get to it?

by **smythie** » Mon Dec 29, 2008 9:31 am

not on the 3 litre anyway. was quite easy, just needed a 10mm spanner, and blade and philips screwdrivers

by **Arith** » Mon Dec 29, 2008 11:12 am

Not on the GT either. Just need to remove the entire air filter box to get to it.

by **overl0ad** » Mon Dec 29, 2008 1:45 pm

no on the 2.5i.

you will need a 10mm socket and some extenders(to make life easier)

it's in the same spot for the 2.5i and the GTB.

by **smythie** » Mon Dec 29, 2008 2:19 pm

I realise this is a little off topic but on the 3.0 there is no resonator in the air filter box. There is however something that I guess is the resonator in the box onto the throttle

by **Arith** » Mon Dec 29, 2008 9:50 pm

smythie wrote:on the 3.0 there is no resonator in the air filter box.

Are we talking about the same white container resonator underneath the air box behind the headlight?

K&N air filter

K&N air filter

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