GoodfellaFD3S

iTrader: (213)

I've received a bunch of PMs about the K&N i'm running on my setup. For those who need a low profile 4 in diameter filter, K&N RU-2510 fits the bill, $32 from Jegs.

Tapered Filter
Flange Dia.- F: 4'', 102 mm
Base Outside Dia.: 5.375'', 137 mm
Top Outside Dia.: 4.375'', 111 mm
Length- L: 3.5'', 89 mm
Top Style: Rubber
Flange Length-FL: 0.625'', 16 mm
Flange Angle-FA: 0º
Flange Offset: 0''

GoodfellaFD3S

iTrader: (213)

http://www.jegs.com/webapp/wcs/store...1_758719_10269

justturbo2

iTrader: (4)

thanks rich

88t2romad

same one i have i think

sk8world

iTrader: (5)

also the cheapie from advanced works fine!

sk8world

iTrader: (5)

oh, not KN but looks similar!

zinx

iTrader: (3)

I use a K&N RU-2520 on my greddy setup, fits great. Probably pretty close in size to the one goodfella posted.

Edit: http://knfilters.com/search/product.aspx?Prod=RU-2520

sk8world

iTrader: (5)

here is the advanced autoparts one.

GoodfellaFD3S

iTrader: (213)

Yeah, that sucker is 5 inches long vs the one I'm forced to use, which is 3.5 inches long. My radiator inlet hose is basically touching the filter as it is.

njstreetrx7

the only thing witht these filters the rubber cant take the heat from the turbo and will melt and possibly send rubber through turbo.
be sure not to tighten the clamp to tight but rather loosely.

also because it cant take heat rubber gets really hard and hard to remove and reinstall because it comes too stiff and not flexible anymore

zinx

iTrader: (3)

Oh, hah, mine touches the radiator hose too, you're turbo must sit a lot closer, maybe even 1.5 inches closer

Torque South

Ha! I've been looking for something like this since I heard the Greddy Airinx I'm using now is a POS. So what's the biggest one I could squeeze into a the tight space between a T78 and the rad hose? Thanks

GoodfellaFD3S

iTrader: (213)

Only you can answer that.....measure the distance from the edge of your turbo inlet to your rad hose.

WanKeL FD RX-7

iTrader: (7)

**** i would like to find a filter like this... where can i find one with less than 3.5 inch long? i have a a-spec long runner manifold and i havent find a filter that fits.

GoodfellaFD3S

iTrader: (213)

Max! Havent seen ya posting or on AIM in a while

I'm running the long runner manifold from ASpec. Order it from Jegs in the link in post #2.

GoodfellaFD3S

iTrader: (213)

bump b/c I'm getting more questions about this little sucker.

EZFD

Sweet!! I just bought one.

arghx

iTrader: (3)

is there any indication that this filter is in some way restrictive because it's so small? I have never seen any conclusive evidence about filter service area vs flow, and in turn its effects on power

Aeka GSR

iTrader: (4)

Does anyone make a 4"x2.5" filter? I seem to be screwed with clearance.

GoodfellaFD3S

iTrader: (213)

Yikes! I wouldn't feel comfortable going much smaller than what I already have to deal with.....

A-Spec Tuning

Sounds like a personal problem

On a more serious note, I would have to agree with you. We went through this debate on another vehicle a while back. The CFM that the smaller filters flow is not very turbo friendly. They work, but they definitely choke the system a bit. Sure better than not running one at all though...

classicauto

iTrader: (3)

I found it gets dirty very quickly, at least on my car with lots of driving. I'm now able to run a longer filter with my new turbo placement, a 6" K&N so I'll see how long this one takes to get bunged up.

The shorty on my car with my driving (and level of dirt out here apparently ) would get BLACK after 7-8000kms.

Aeka GSR

iTrader: (4)

where did you get that flex hose for your radiator? That may solve all my problems since I have a custom hard line that is causing my clearance problems.

GoodfellaFD3S

iTrader: (213)

Probably also from advanced auto. I have something similar with chrome ends that you can either get at a local parts store, or search on summit racing.

Aeka GSR

iTrader: (4)

yeah I got one from some online speed shop. Worked great, got that filter too.