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Old Nov 6, 2018 | 07:54 PM
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Default Drop-in air filter panel

2006 STi. Mapped to 300-ish. Ninja II exhaust. Otherwise, bone stock-a-roony.

I want some more air into the system. Which is the best filter panel? Stick with OEM? PiperX? K&N? This is just for breathing: I know there won't be any gains.

Respekkkkk.

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Old Nov 6, 2018 | 07:56 PM
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cosworth seems to be a good bet.
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Old Nov 6, 2018 | 07:57 PM
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Originally Posted by pjarvis6666
cosworth seems to be a good bet.
Cheers buddy.

What do people make of this here 'Do-Luck' brand? Apparently, Scooby Clinic tested them - and they came out all-round best?
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Old Nov 6, 2018 | 07:58 PM
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don't quote me on it but I don't believe the stis with PPP have any different filter installed so OEM should be okay. but no hard im k&n or cosworth
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Old Nov 6, 2018 | 07:59 PM
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Originally Posted by hackisfun
don't quote me on it but I don't believe the stis with PPP have any different filter installed so OEM should be okay. but no hard im k&n or cosworth
And do you have to oil these other filters you mention? Don't want a messed-up MAF.
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Old Nov 6, 2018 | 08:40 PM
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Ok. I went with the Green drop-in panel filter. £47 1st class from the Bay.

Let's see what happens then. I'll report back.
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Old Nov 7, 2018 | 07:38 AM
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I’ve used the hks item and using one currently in little brothers std ppp no eml lights works fine

budget would be the blue cosworth item over the oiled k&n item imo
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Old Nov 7, 2018 | 08:08 AM
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ran 352bhp on my last blob. That had an oem type air filter. Mapped and ran well with no problems. I don't doubt there might be some benefit to some of the more expensive ones...but only very marginal......
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Old Nov 7, 2018 | 05:57 PM
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No bud there covered in oil. I bought one after reading mag reviews few years back and best for gains. But when I bought one if came in a sealed bag dripping in oil. Then read on here about the oil clogging up your maff.

Others have said about poor quality aswell. I'd say Cosworth. I bought Pipercross R also good half the price of Cosworth.

Here is the link


http://www.subarupartsstore.co.uk/in...rpcfa1000.html

Originally Posted by Doc T
Cheers buddy.

What do people make of this here 'Do-Luck' brand? Apparently, Scooby Clinic tested them - and they came out all-round best?

Last edited by jaygsi; Nov 7, 2018 at 06:06 PM.
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Old Nov 7, 2018 | 08:05 PM
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A while ago they did a test on loads of panel filters there was nothing in it , the best one was the sti standard paper filter , but if you are looking for a cheap easy to clean option then buy a k and n or cosworth one but don’t expect any benefits just a reduction long term in cost because you clean it and don’t buy one each time , just don’t over oil or oil the wrong side of a k and n due to maf issues
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Old Nov 7, 2018 | 10:41 PM
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Who are they?



Originally Posted by Vxr2010
A while ago they did a test on loads of panel filters there was nothing in it , the best one was the sti standard paper filter , but if you are looking for a cheap easy to clean option then buy a k and n or cosworth one but don’t expect any benefits just a reduction long term in cost because you clean it and don’t buy one each time , just don’t over oil or oil the wrong side of a k and n due to maf issues
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Old Nov 8, 2018 | 12:28 AM
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can’t remember a big write up on it and many filters tested
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Old Nov 8, 2018 | 12:39 AM
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The bhp difference from best to worse filter is so small you won’t notice it , you will notice more power increase on a cold day than you will a filter change , cone filters have an effect but the cost of a remap on top , plus when i had one on mine the noise ended up being rather annoying , if you do everything like de cat sports exhaust air filter re map then as a package you will notice it as a package
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Old Nov 8, 2018 | 09:02 AM
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He said he's not after more power just trying to get more air in the system. Stuff I've read on cone filters don't do much at all. Problem is they suck in unwanted heat MCM did a dyno test on some.




Originally Posted by Vxr2010
The bhp difference from best to worse filter is so small you won’t notice it , you will notice more power increase on a cold day than you will a filter change , cone filters have an effect but the cost of a remap on top , plus when i had one on mine the noise ended up being rather annoying , if you do everything like de cat sports exhaust air filter re map then as a package you will notice it as a package
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Old Nov 9, 2018 | 08:52 AM
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Originally Posted by Doc T
Ok. I went with the Green drop-in panel filter. £47 1st class from the Bay.

Let's see what happens then. I'll report back.
F%#k me - how much!!!!!!!
https://www.importcarparts.co.uk/par...y=&searchPart=
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Old Nov 10, 2018 | 07:44 AM
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I’ve always used Green filters ����
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Old Nov 10, 2018 | 08:14 AM
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I tried a few years back the Pro-R one linked further up. I personally didn't like it, made my 2007 STi feel lean.
Probably some of it was just in my head lol.

Gave it to a mate at work, I'd only done around 25 miles on it. Dropped straight into his 53 plate Nissan 350Z....he likes it.
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Old Nov 10, 2018 | 09:32 AM
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Originally Posted by The Trooper 1815
cosworth are throw away iirc, green can be cleaned and reused hence price difference
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Old Nov 10, 2018 | 09:48 AM
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Cosworth has been nothing but "badge engineering" over the last number of years and not even sure whats going on with them at this moment with the large scale sell off of parts, stock, etc.............
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Old Nov 10, 2018 | 11:24 AM
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Thanks for the feedback, chaps.

Dropped the Green filter in, and didn't go for the resonator delete in the end. Filter only very mildly oiled - nothing like the sticky mess I remember with K&N variants.

Slight increase in induction sound, but main benefit is top-end breathing. I now hit 80mph (ON A CLOSED, PRIVATE TRACK IN MADRID) in third at 6,000rpm. So - she's breathing better Job done.

Kept old filter for future cleaning of new one, and in case the engine doesn't like the change. No CEL thus far. All good. (And £47 was £6 p+p to get it early because I am simultaneously 42 AND 13, and wanted my shiny new thing).

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Old Nov 10, 2018 | 06:19 PM
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Originally Posted by Gambit
cosworth are throw away iirc, green can be cleaned and reused hence price difference
K&N are reuseable and less money.
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Old Nov 11, 2018 | 03:29 PM
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I see what you mean.


https://rover.ebay.com/rover/0/0/0?m...2F273554551523


Originally Posted by stockcar
Cosworth has been nothing but "badge engineering" over the last number of years and not even sure whats going on with them at this moment with the large scale sell off of parts, stock, etc.............
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Old Nov 16, 2018 | 11:50 PM
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https://m.youtube.com/watch?v=GS69ow...ature=youtu.be


This is worth a watch.
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Old Nov 17, 2018 | 06:09 AM
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A good clip , it does show that air filters make a very slight difference but it’s so small you would not notice it , the simple answer is no , every thing i drive has a performance ?? lol filter in it but i look at it as an only cheaper option instead of buying a new filter each time rather than a performance mod , a cold day or better fuel would probably give you more of a noticeable change
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Old Nov 17, 2018 | 01:17 PM
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I see what your saying but for 2bhp every little helps. But as the OP said he wasn't after more performance just more air. So extra bhp will just be a bonus.


Originally Posted by Vxr2010
A good clip , it does show that air filters make a very slight difference but it’s so small you would not notice it , the simple answer is no , every thing i drive has a performance ?? lol filter in it but i look at it as an only cheaper option instead of buying a new filter each time rather than a performance mod , a cold day or better fuel would probably give you more of a noticeable change
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