[hnijhar]

Hey guys! I have a 435i MPPK with the n55. I heard that the airbox airfilter is very restrictive so I'm looking to just upgrade the air filter with a drop in. I don't want to change the whole intake as I have the MPPK intake and MPPK airbox, only the drop in filter.

What filter would you Guys recommend that is best for a little more power?

k & n? Or are there others?
Thanks

[F30MI]

Originally Posted by hnijhar

Hey guys! I have a 435i MPPK with the n55. I heard that the airbox airfilter is very restrictive so I'm looking to just upgrade the air filter with a drop in. I don't want to change the whole intake as I have the MPPK intake and MPPK airbox, only the drop in filter.

What filter would you Guys recommend that is best for a little more power?

k & n? Or are there others?
Thanks

Don't try K&N, it's not worth than rink if under warranty

[mike@x-ph.com]

Originally Posted by hnijhar

Hey guys! I have a 435i MPPK with the n55. I heard that the airbox airfilter is very restrictive so I'm looking to just upgrade the air filter with a drop in. I don't want to change the whole intake as I have the MPPK intake and MPPK airbox, only the drop in filter.

What filter would you Guys recommend that is best for a little more power?

k & n? Or are there others?
Thanks

K&N offers the most popular filter

[mike@x-ph.com]

Originally Posted by M3drives

Don't try K&N, it's not worth than rink if under warranty

What risk?

I have never in my entire life heard of anyone has warranty issues because of an air filter

[F30MI]

Originally Posted by mike@x-ph.com

What risk?

I have never in my entire life heard of anyone has warranty issues because of an air filter

I got engine light on, took it to dealer, code came up for K&N filter.
They charged me $140 for trouble shooting even though it's under warranty and told me if you continue using ur engine not covered( even they added note in history)

[2000Z3M]

Originally Posted by mike@x-ph.com

What risk?

I have never in my entire life heard of anyone has warranty issues because of an air filter

the oils used in K&N can coat the MAF sensor and trip faults.

[RoundelM3]

AFE also makes a drop-in filter for the N55 stock airbox. I also have never experienced or heard of anyone whose engine warranty was denied because of a K&N or other oiled-cotton filter. Yes, you need to be careful when cleaning and re-oiling the element, but that's just common sense (and following the directions on the AFE or K&N filter cleaning kit).

That aside, what "code" came up for K&N filter? Was it a Mass Air Flow code? BMW would not have any fault codes for specific products.

[Rick4345]

Originally Posted by M3drives

I got engine light on, took it to dealer, code came up for K&N filter.
They charged me $140 for trouble shooting even though it's under warranty and told me if you continue using ur engine not covered( even they added note in history)

They can't do that. Look up the Magnuson Moss Warranty Act.

I've had either a K&N filter or intake in every car or motorcycle I've ever owned. I also was a state trooper for 26 years and had them in all my patrol cars. Not even a hint of a problem.

[VCuomo]

Originally Posted by hnijhar

Hey guys! I have a 435i MPPK with the n55. I heard that the airbox airfilter is very restrictive so I'm looking to just upgrade the air filter with a drop in. ...

You "heard" this, so therefore it must be true? Do you really think that the BMW engineers would specify an air filter that is overly restrictive?

The biggest issue is changing the air intake filter at reasonable intervals so that you're not driving around with a clogged, dirty filter. Just change it at, say, 10K mile intervals with a Mann paper filter and you'll be fine.

[Vegetable]

Originally Posted by VCuomo

You "heard" this, so therefore it must be true? Do you really think that the BMW engineers would specify an air filter that is overly restrictive?

The biggest issue is changing the air intake filter at reasonable intervals so that you're not driving around with a clogged, dirty filter. Just change it at, say, 10K mile intervals with a Mann paper filter and you'll be fine.

Exactly, BMW is perfect. You think BMW would put shixty HPFPs in their cars? No way Jose.. And you think BMW would require a no maintenance transfer case for xDrive cars if indeed it needed periodic maintenance.. Not a chance.. Stay stock and never question a BMW engineer that likely had the scholastic philosophy that C's get degrees.

[440xiGCMsport]

Originally Posted by Vegetable

Exactly, BMW is perfect. You think BMW would put shixty HPFPs in their cars? No way Jose.. And you think BMW would require a no maintenance transfer case for xDrive cars if indeed it needed periodic maintenance.. Not a chance.. Stay stock and never question a BMW engineer that likely had the scholastic philosophy that C's get degrees.

Air filter is cheap and inexpensive so don't compare it to the hpfp.
to get a good idea how little the air filter matters look at the mppk. if the air filter was really that restrictive and would add enough power to make a difference you don't think that BMW would include or price in an upgraded filter with the mppk?
it is obvious that BMW put a good enough filter that would handle the mppk. the only time you may want to look at something else is if you go aftermarket tuning and you are making big power. then the stock filter may need to be changed out.

[Vegetable]

Originally Posted by 440xiGCMsport

if the air filter was really that restrictive and would add enough power to make a difference you don't think that BMW would include or price in an upgraded filter with the mppk?
.

BMW has only recently decided to take advantage of the aftermarket market.. Give them time.. I'm sure we will see your future 440 xDrive 4-door sedan/coupe semi truck with the offering of a genuine BMW accessory intake making 10 more BHP for only $1,000.

[440xiGCMsport]

this semi truck will still be faster than your car.
BMW may offer an intake for $1000 but that still doesn't mean the stock one is no good as you ascertain. it would just mean that BMW is trying to make more money. BMW hasn't done it yet so what you are saying is moot.

[Vegetable]

Originally Posted by 440xiGCMsport

this semi truck will still be faster than your car.
BMW may offer an intake for $1000 but that still doesn't mean the stock one is no good as you ascertain. it would just mean that BMW is trying to make more money. BMW hasn't done it yet so what you are saying is moot.

Well I guess this shows how much of a noob you are to the BMW world...When BMW first introduced the MPPK for the X35 with EWG in 2013-ish,they didn't change the air box.. Then, after reports of CELs, they changed the air box to include a side hole in the air box to bring in more air flow. It worked, surprisingly. As for your 4,000lb 4wd Subaru beating my 435i with MPPK + FBO and a little help from Jb4.. it could happen. But we should probably wait to race until you actually get your 440 Xi sedan.

[440xiGCMsport]

Originally Posted by Vegetable

Well I guess this shows how much of a noob you are to the BMW world...When BMW first introduced the MPPK for the X35 with EWG in 2013-ish,they didn't change the air box.. Then, after reports of CELs, they changed the air box to include a side hole in the air box to bring in more air flow. It worked, surprisingly. As for your 4,000lb 4wd Subaru beating my 435i with MPPK + FBO and a little help from Jb4.. it could happen. But we should probably wait to race until you actually get your 440 Xi sedan.

lol you just made my case that the current air filter is more than enough even for slight boost if it wasn't than you would get the cell like you indicated on the x35.
I may be a noob but you are a knob.

[CIWS]

Originally Posted by roundel335

AFE also makes a drop-in filter for the N55 stock airbox.

The aFe Pro Dry filter does not have any oils on it. It's what I'm using in mine.


http://afepower.com/afe-power-31-102...y-s-air-filter

[RoundelM3]

Originally Posted by Vegetable

Well I guess this shows how much of a noob you are to the BMW world...When BMW first introduced the MPPK for the X35 with EWG in 2013-ish,they didn't change the air box.. Then, after reports of CELs, they changed the air box to include a side hole in the air box to bring in more air flow. It worked, surprisingly.

The hole in the lower airbox is for a more robust intake sound - it has little or nothing to do with increasing airflow. It's not that big to begin with.

[Vegetable]

Originally Posted by roundel335

The hole in the lower airbox is for a more robust intake sound - it has little or nothing to do with increasing airflow. It's not that big to begin with.

well IMO it was a fail on both fronts.. Was only slightly more aggressive sounding than the stock box, and even though that little hole punched in the air box was said by BMW to increase airflow, it probably was negligible in terms of power gains given the restrictive filter...

OP this is a good thread..

http://f30.bimmerpost.com/forums/sho...kit+air+filter

[RM7]

People still think intakes=horsepower?

[fscuderia23]

I've been running the aFe pro dry S drop in filter in my mppk'd 14' 335i for a couple of months now. No noticeable power difference, but I wasn't really expecting any either...just some more whooshing and blow off noises than stock...no CELs or anything out the ordinary to report. Overall pretty happy

[CIWS]

I don't really notice any extra noises from using the drop-in filter. Any power gains would probably be very difficult to measure without putting the car on a dyno under hard acceleration when there's a lot of air being pulled in. Then still the couple of HP it may add would fall within a 1% tolerance of change and not really notable.
But it does allow a better air flow through the box and it helps the engine breath when it needs to and that is a benefit to its operation not a minus. Plus it can be removed and cleaned and then dropped back in after X number of miles of use. All good things.

[RoundelM3]

Originally Posted by Vegetable

well IMO it was a fail on both fronts.. Was only slightly more aggressive sounding than the stock box, and even though that little hole punched in the air box was said by BMW to increase airflow, it probably was negligible in terms of power gains given the restrictive filter...

OP this is a good thread..

http://f30.bimmerpost.com/forums/sho...kit+air+filter

Back in the 1990s, Porsche had a "motor sound option" that consisted of holes in the intake airbox to increase the intake noise. It, and the one in the MPPK lower airbox, did absolutely nothing for increased airflow, since all of it went through the filter element.