filter

looking to replace my filter.

Any preferences ?

did a quick search and have not found a comparison of whats out.

MS ? AA?

I got a K&N $55 brand new on amazon a few months ago. No sense in paying $100+ for one

AA!

thanks guys

01'325rip wrote

thanks guys

Stop by we have them in stock.

ight ill see if i can run by this week.

KN actually has shown loss of power on other bimmers and by far has the worst filtering of any aftermarket ones.

Its a no brainer to go with BMC, MS or AA green filters. All about 100 bucks. If saving 40 dollars by buying a kN instead is important to you, then you should not be driving a m3

Ateam wrote

KN actually has shown loss of power on other bimmers and by far has the worst filtering of any aftermarket ones.

o really?

Ateam wrote

KN actually has shown loss of power on other bimmers and by far has the worst filtering of any aftermarket ones.

I'd love to see your evidence for your poor filtration accusation. The used oil analyses for my 350z with a k&n filter always showed very low silicates indicating good filtration.

Beyond that, your statement doesn't make sense to me. How can it make less power (i.e. flow less) AND produce poor filtration? I highly doubt that. Seems to me it's either got to be one or the other.

Ateam wrote

KN actually has shown loss of power on other bimmers and by far has the worst filtering of any aftermarket ones.

Its a no brainer to go with BMC, MS or AA green filters. All about 100 bucks. If saving 40 dollars by buying a kN instead is important to you, then you should not be driving a m3

O rly? maybe the biggest filter company should close their doors and i should sell my m3 then because I prefer to spend my $$$ smarter

01'325rip wrote

ight ill see if i can run by this week.

I did not mean on this car but there is some other cars with info floating around that KN lost some power. Ill see if I can dig them up. Biggest does not always mean best. Remember they also advertise 15-20hp gains and people buy into this. People will buy whatever they are told if marketed correctly

^That was aFe for the 350Z. The claimed ridiculous gains for their intakes for the 350Z yet people don't seem to have an issue with them here.

I just think it's a little reckless to make claims like that when people use threads like this to make decisions about what to buy.

I personally think the noise that the aftermarket filters make is awful.

I'm probably going to take mine out. It might sound cool on a race car but on a street car it sounds like shit... there is a faint rattle rattle rattle under acceleration.

Mine is an AA btw, but they all do this as far as I know.

interesting... anyone else hate the noise?

01'325rip wrote

interesting... anyone else hate the noise?

I think a lot of people like it because it's a noisemaker but personally I find it cheapens the experience a bit. Maybe I'd like it on a race car but not on my street M3. Here's 2 links to some discussion:

http://www.m3post.com/forums/showthread.php?t=470613

http://www.m3post.com/forums/showthread.php?t=603650

Ateam wrote

KN actually has shown loss of power on other bimmers and by far has the worst filtering of any aftermarket ones.

Loss of power? From a filter??
K&N has an average filtration efficiency of 98.69% vs stock paper (same as an AFE oiled filter). These averages vs stock don't vary that much between the top brands.

I personally like AA green filter the best. If has an incredibly solid body which is less prone to the dreaded rattling.

http://www.m3post.com/forums/showthread.php?t=481587

Kyoshi71 wrote

Loss of power? From a filter??
K&N has an average filtration efficiency of 98.69% vs stock paper (same as an AFE oiled filter). These averages vs stock don't vary that much between the top brands.

I personally like AA green filter the best. If has an incredibly solid body which is less prone to the dreaded rattling.

http://www.m3post.com/forums/showthread.php?t=481587

My AA rattles.

Kyoshi71 wrote

Loss of power? From a filter??
K&N has an average filtration efficiency of 98.69% vs stock paper (same as an AFE oiled filter). These averages vs stock don't vary that much between the top brands.

I personally like AA green filter the best. If has an incredibly solid body which is less prone to the dreaded rattling.

http://www.m3post.com/forums/showthread.php?t=481587

My AA emits a rattling noise. With the filter, you can hear more of the engine's ITB's. It doesn't actually "rattle" in the airbox, I don't think.

smmmurf wrote

My AA emits a rattling noise. With the filter, you can hear more of the engine's ITB's. It doesn't actually "rattle" in the airbox, I don't think.

Resonance instead of rattle maybe?

I haven't noticed any strange noises from my K&N filter. When are you guys hearing these noises?

M3PO wrote

I haven't noticed any strange noises from my K&N filter. When are you guys hearing these noises?

Same with my K&N...it in there really tight. Put about 4K miles on it so far and no complaints