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      05-14-2011, 12:40 AM   #1
f00dstamps
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K&N for 335d

Has anyone tried the K&N drop-in filter for the 335d? It appears to be the only modification available to the intake system.
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      07-13-2011, 11:33 PM   #2
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air filter

Has anyone tried K&N, I have been eyeing it out, any experiences?
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      07-16-2011, 07:58 AM   #3
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I would also like to know
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      07-16-2011, 10:07 AM   #4
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I would also like to know
Will try it next week and tell u all
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      07-16-2011, 10:18 AM   #5
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I would never use K&N in a daily driver.
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      07-16-2011, 12:56 PM   #6
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Originally Posted by Socom View Post
I would never use K&N in a daily driver.
Just out of curiosity, why do you say so? I'm considering the Euro AirBox for my NA engine, and I would jump to replace the BMW paper cone filter with the K&N cone filter. What's your beef with them? I don't mean that in an insulting way, I just want to understand why you don't like them.
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      07-16-2011, 02:42 PM   #7
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[quote=rollinstone157;10036959][quote=Socom;10036384]I would never use K
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      07-16-2011, 08:57 PM   #8
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Originally Posted by rollinstone157 View Post
Just out of curiosity, why do you say so? I'm considering the Euro AirBox for my NA engine, and I would jump to replace the BMW paper cone filter with the K&N cone filter. What's your beef with them? I don't mean that in an insulting way, I just want to understand why you don't like them.
No reason to let more dirt in engine for a different sound. Hp gains are negligible
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      07-17-2011, 09:34 AM   #9
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i agree. Oiled filters like K&N have caused gummed up MAF's and stuck idle air control valves on my older cars. Its not K&N only, but Injen and other oil-based filters. i've switched to dry flow filters like AEM. They seem thicker and filter better. Gauze-type seems too porous.
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      07-22-2011, 03:31 PM   #10
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i agree. Oiled filters like K&N have caused gummed up MAF's and stuck idle air control valves on my older cars. Its not K&N only, but Injen and other oil-based filters. i've switched to dry flow filters like AEM. They seem thicker and filter better. Gauze-type seems too porous.
While i'm sure it lets in more dirt than a conventional paper filter does i really dont think it is going to make that much of a difference in your car unless you are driving in a dusty climate all day every day. I have been using some sort of K&N filter in all my cars/motorcycles since 1992 and have never faced any issues. Granted i change my oil frequently (every 2500 miles using synthetics)on my other cars, once every 6 months on my motorcycle and atv and on my E90 i change it once a year (mine is a 2006 with 19,000 miles) ii also inspect the K&N filters every service and will either clean or replace it if it looks less than serviceable.
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      08-13-2011, 04:00 PM   #11
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K&N million Mile Warranty, filter outlasts your engine!

Seems to be common that people get MAS errors on BMW and other cars from K&N oil as I read in forum for our pilot. Here in Arizona lots of dust, so I'll keep OEM. FYI: I removed the K&N in my Honda after reading all the posts about K&N not cleaning air as well as paper OEM filters.

Explains why K&N gives million mile warranty on the filter. They know your engine wont last that long with a K&N in it.
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      08-13-2011, 07:32 PM   #12
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How About BMC are they better then kn cause that what i have

thanks
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      08-15-2011, 01:40 PM   #13
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Quote:
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How About BMC are they better then kn cause that what i have

thanks
Honestly as a daily driver I've seen zero evidence where anything other than OEM was best.
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      08-15-2011, 07:39 PM   #14
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I've had a K&N in my car for about 30k miles...no issues with it whatsoever, but no real differences, either.
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      09-04-2011, 07:31 AM   #15
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I've had a K&N in my 4-Runner for over 120K miles - No issues other than saving $ by not buying the replacement paper filters.

Running a BMC in the M3. Again, no issues.

Looking at eventually getting one for the 335d.

Any vehicle I plan to keep will have one.
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      09-05-2011, 08:41 AM   #16
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Quote:
Originally Posted by Socom View Post
Honestly as a daily driver I've seen zero evidence where anything other than OEM was best.
This.

If there were anything to be gained by installing something as easy as a filter, cone or otherwise, one would think the car manufacturers would install them. They might make a car sound a little better but that's all that will be gained and at the sacrafice of allowing more dirt into the engine.
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      09-09-2011, 02:23 PM   #17
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Quote:
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This.

If there were anything to be gained by installing something as easy as a filter, cone or otherwise, one would think the car manufacturers would install them. They might make a car sound a little better but that's all that will be gained and at the sacrafice of allowing more dirt into the engine.
What incentive would an automobile manufacturer have to provide a reusable filter instead of selling replacement filters to you for the life of the car?
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      09-09-2011, 08:44 PM   #18
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Filter test

http://home.roadrunner.com/~jbplock/ISO5011/SPICER.htm

But hey if an air filter makes you feel better have at it.
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      09-10-2011, 12:29 PM   #19
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What incentive would an automobile manufacturer have to provide a reusable filter instead of selling replacement filters to you for the life of the car?
Id rather spend $25 every couple of years on a OEM airfilter instead of scoffed cylinder walls from 1950 air filtrations tech.
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      05-24-2014, 02:02 PM   #20
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OEM only OEM only OEM only, it will mess up your life, not really but can fool your MAF and then you have problems...I know I tried one on my VW TDI...
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      05-24-2014, 02:12 PM   #21
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OEM only OEM only OEM only, it will mess up your life, not really but can fool your MAF and then you have problems...I know I tried one on my VW TDI...
Holy thread revival batman but since this is back where can i find the filters for 25$ haha theyre expensive now.
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      05-24-2014, 02:16 PM   #22
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Holy thread revival batman but since this is back where can i find the filters for 25$ haha theyre expensive now.
Im old skool that way...
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