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Old 07-14-2003, 12:11 PM   #1
JDMTEG98
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Default Drop in Filter Replacments

Hey guys just wondering which drop in filters like K and N would be worth getting.

Also will the K and N for 2002-2003 WRX work on the 04 Sti?

Thanks
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Old 07-14-2003, 12:15 PM   #2
Sparks
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Yep, same filter
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Old 07-14-2003, 12:17 PM   #3
JDMTEG98
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Ok well called K and N, Geniuses said they didn't know and they had one for a 1.6L I was like "Excuse me"??
Anyway this is what they have posted, hope someone that has done this can help

Air Filter WRX Wagon Turbo
2003 SUBARU Impreza AUTO 2.5L F4 F/I
Part # 33-2232

Air Filter WRX, Turbo
2003 SUBARU Impreza AUTO 2.0L L4
Part # 33-2232
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Old 07-14-2003, 12:33 PM   #4
Sparks
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Subaru only uses 2 filters, the long one for right behind the throttle body and the short one for the air box on the fender.
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Old 07-14-2003, 01:09 PM   #5
JDMTEG98
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What do recommend for replacement filter? I am thinking of replacing the drop in for air box
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Old 07-14-2003, 01:24 PM   #6
Sparks
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K&N or something similar work well. Just make sure there is no excess oil on the filter. The air meter does not like oil and is very expensive to replace.

I came across something called a green filter from Airborne Motorsports that looks interesting.
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Old 07-14-2003, 03:41 PM   #7
JDMTEG98
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I see


Intresting its green

Name: Green Filters
Description: Highest flowing, highest quality filters in the business. 2 layers of woven cotton mesh (vs 4 layers of cotton gaze like most competitors) stops 0.5 microns, stronger than its competitors, air enters straighter causing higher flow rates. More pleats have



Dunno I think I trust K and N more
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Old 07-14-2003, 04:37 PM   #8
Sparks
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Eric from Airborne showed me one that was cut appart. Green uses a different material than the gause in the K&N. He says it's better, he should if he sells them
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Old 07-14-2003, 05:16 PM   #9
JDMTEG98
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Doubt the green has a warranty like K an N's. I trust K&N more been around for years, I don;t care if I am not getting the extra 2 HP out of the Green. Just looking for some more sound, think the filter will make it a little lounder?
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Old 07-14-2003, 07:04 PM   #10
Scuba Steve
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Quote:
Originally posted by JDMTEG98
Just looking for some more sound, think the filter will make it a little lounder?
I doubt just swapping filters will make it louder. Removing the intake resonator definitely makes it louder. You can hear the turbo and the blow-off valve very nicely, especially with-out a radio.
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Old 07-14-2003, 07:18 PM   #11
JDMTEG98
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Thanks scubba steve !
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Old 07-17-2003, 12:46 AM   #12
STI_Steve_555
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Default K&N Filters are Cr@#

I have searched far and wide for good air filters for my Porsche and every maintenance manager has told me horror stories of K&N's. Apparently you can see track marks on intakes from particles getting through the K&Ns. Allot of people have been screwed by this when there engines went bad and warranty did not cover them due to the obvious signs of an aftermarket part.
Bar none the best brand I have found, and agreed upon by factory Porsche, Ferrari, Audi teams is the BMC Airfilter, www.BMCAIRFILTER.com
Never tried green filters, but if 3 of the top car racing contenders in various types of car racing use them, and you cannot go wrong
IMHO
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Old 07-17-2003, 02:50 AM   #13
Darwood
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I'm not a big fan of K&N filters after using them in my truck. After off-roading I would find alot of dust in the air box that was past the filter.

Also after doing the simple test of holding up the filter to the light and being able to see light shinning through holes I decided they don't filter that well. If I can see light going through pin holes in the filter that can't be good. I encourage anyone to do this test.

I've also seen studies that have shown they don't filter that well.

I don't buy K&N filters anymore. They just don't filter that well. In my truck I've switched to the Amsoil foam filter... nothing gets past it. In my STi I'm going to stick to paper for a while.
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Old 07-17-2003, 11:03 AM   #14
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Default Re: K&N Filters are Cr@#

Quote:
Originally posted by STI_Steve_555
Allot of people have been screwed by this when there engines went bad and warranty did not cover them due to the obvious signs of an aftermarket part.
I'm no lawyer (thank heavens) but I think denying a warranty for a K&N filter would violate the Warren-Magnusson act (I think that's the name).

Whatever the name of the law, it forbid companies for denying warranties on the basis of using aftermarket oil/air filters, etc.

But to challenge a denied warranty on those terms would requires lawyers (shudder) and all that BS.

I personally use K&N filters and I accept that I may be increasing risk of engine damage if only by the extra strain that a few more liters of airflow they create.
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Old 07-23-2003, 11:52 AM   #15
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Default Re: Re: K&N Filters are Cr@#

Quote:
Originally posted by KoneKiller


I'm no lawyer (thank heavens) but I think denying a warranty for a K&N filter would violate the Warren-Magnusson act (I think that's the name).

Magnuson-Moss Act
Congress in 1975 enacted the federal Magnuson-Moss Act to regulate written consumer product warranties.

"Among those provisions, FTC regulations state: “(c) No warrantor of a consumer product may condition his written or implied warranty of such product on the consumer’s using, in connection with such product, any article or service (other than article or service provided without charge under the terms of the warranty) which is identified by brand, trade, or corporate name; except that the prohibition of this subsection may be waived by the Commission if – (1) the warrantor satisfies the Commission that the warranted product will function properly only if the article or service so identified is used in connection with the warranted product, and (2) the Commission finds that such a waiver is in the public interest.” (42 U.S.C. 2303(C))

Under the Magnuson-Moss Act, aftermarket equipment which improves performance does not void a vehicle manufacturer’s original warranty, unless the warranty clearly and conspicuously states that aftermarket equipment voids the warranty. Most states have warranty statutes, as well. Which provide further protections for vehicle owners.


In other words, that means a dealer can’t wiggle out of his legal warranty obligation merely because you install aftermarket equipment. To find out if any aftermarket equipment automatically voids your vehicle’s warranty, check the owner’s manual. It is likely the language you are looking for appears under a heading such as “What Is Not Covered” Although the language seems negative, remember your vehicle manufacturer is simply saying he does not cover the aftermarket products themselves. He is not saying that the products would void the vehicle warranty. "

From http://www.performancemotoroil.com/W...e_Magnuson.htm
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Old 07-24-2003, 01:37 AM   #16
Irishman
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Default

So what filters are you guys using? are there any that will increase performance and not let in particles or lean out the engine to bad? I am planning on changing my filter in the next couple of weeks and am not sure if I want to stay with the stock filter.
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Old 07-24-2003, 08:33 AM   #17
bcblues
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I have used K&N filters for years on motorcycles, and on American V8 engines (both racing and offroad). I, too have seen plenty of K&N’s that have let in enough dust to wreck havoc with an engine. Every time, this can be traced to really poor maintenance on the filter. I have witnessed K&N filters being “blown out” using compressed air, and even one case (in a supposedly reputable shop!) Of a tech using a wire brush and solvent to “clean” the filter. No wonder that there are problems! I have used one particular K&N for the past 10 years on my “foe-by” pick-em-up truck (345 HP, high-torque custom-built chevy 355 engine) and have yet to see ANY particulate matter get past the filter. And this truck sees extensive (and intensive) off-road use in extremely dusty conditions. But, I clean the filter correctly using the recommended K&N “recharge packs”.

I HAVE seen cases where too much filter oil has left minute streaks of OIL particles in the intake past the filter. This may be what some people see and freak out, thinking that it is particulate matter (dust).
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