K & N Air Filter - Mercedes Benz SLK Forum

Performance MODS for the R170 Tuning and Performance modifications for your SLK

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#1 Old 10-14-2017
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K & N Air Filter

Any significant improvements after installing? Considering one for my 01 SLK 230.
Thanks
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#2 Old 10-14-2017
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Until you get a reply
Please use search
I'm at hockey game or I would post it


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#3 Old 10-14-2017
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Mercedes Benz SLK Forum - Search Results for K & N filters
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#4 Old 10-14-2017
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Welcome to the forum I have been using [email protected] Cone Filters for years on different brands of cars some manufacturer claim a up to 7 Hp increase. Well I can not say if that is true or not but on every car I installed them it seemed too me that the car had a better throttle response because of the air flow over the stock filter. Of Course if you like the "Whoooosssh" Sound that improves over the stock air filter too.
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#5 Old 10-16-2017
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#6 Old 10-16-2017
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Interesting article. Thanks
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#7 Old 10-17-2017
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After reading many other posts about aftermarket air filters; K&N, Green. I have decided to steer clear of them. All the talk of problems with potential MAF contamination and debate on their improvement to performance has left me with enough doubt that I'm gonna stay with conventional air filters and change them every 3,000-4,000 miles. I am quickly learning that if it ain't broken, don't fix it.
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I have a story for you
2008
Bought my 2009 SLK55
Put greens in em
after a little while, I got a CEL Check engine light
Took into service
Needed a new MAF
Why?
The green filters disintegrated. Fortunately the MAF stopped the pieces from getting into the engine
This was back when they had issues with a bad batch of green filters


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#9 Old 10-17-2017
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@jbanks15 That is so unlucky. Perhaps you need one of these

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#10 Old 10-17-2017
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Back on topic I have always used K&N with no problems but I don't use oil on them. Some cars have appeared to give better performance using them and some couldn't tell any difference.
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#11 Old 10-18-2017
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Yikes! Thanks for sharing.
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interesting subject as I was thinking of doing this myself...

Do most agree with the if it aint broke dont fix it approach?
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Search of our site with K & N keywords

https://www.google.com/search?q=site....0.OqZ6nM1NBrI

Search of our site with green keyword

https://www.google.com/search?q=site....0.mKmc1FVBDvk


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#14 Old 10-18-2017
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I read somewhere that you can hear the blow-off valve more clearly with a CAI setup. mainly because you are venting the excess pressure into open air rather than back into the main filter housing.

I believe I also read that in order for the CAI to work at its peak, you need to remove the baffle in the duct just before the air gets to the supercharger. also makes the supercharger a little louder.
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this has officially surpassed my level of expertise.

I think I'll leave it
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this has officially surpassed my level of expertise.

I think I'll leave it
good call. It's better to focus your attention on painting your wheels blue.
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I think there's little doubt that K+N style filters allow substantially more fine particles to pass compared to good quality paper - and that as the 'sticky' oil gets full, like a flypaper, an increasing amount of dust will pass through the intake. Does this matter?
Back in the day when I used to sponsor race bikes, carburettored, with open bellmouths, our mechanic was convinced (and convinced me) that over time, this sandy dust was abrasive enough to erode carburettor slides and jets, and even the bores and valve seats. Didn't matter that much on engines that were routinely run to destruction and rebuilt. Do I want fine sand entering my AMG engine, lovingly nailed together by Dennis Specht and designed to run to fine tolerances for many many years? Not so much...

With paper elements, the more clogged they get, the more dust they trap - not so with oiled filters. So I'm with SEACHAMP; use a recommended paper filter and change them frequently. I've taken filters out of my 55 which appear to be very clean, but once changed, the engine performs noticeably differently - namely more aggressive creep at idle, more responsive to throttle and interestingly, less soot on the rolled edge of the tailpipes, which I clean at every fill-up. As a matter of fact, I use that soot as a major determining factor as to when to swap the filters.
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#19 Old 10-18-2017
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Originally Posted by Turdo2 View Post
good call. It's better to focus your attention on painting your wheels blue.

Wheels blue, interior repainted and also interior blue lighting...

Might be a bit too much... ?


Something similar to this...

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#20 Old 08-10-2018
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Originally Posted by SEACHAMP View Post
Any significant improvements after installing? Considering one for my 01 SLK 230.
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I recently got a 98 slk230 and have been adding mods and tracking performance with a 0-60 app on my phone....

The k&n posted same time as the stock filter.

This would indicate no performance gain and a waste of 50 quid
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