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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Eurobox: K&N vs Afe Pro Dry air filters



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      02-07-2013, 09:34 AM   #1
MonsterM
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Eurobox: K&N vs Afe Pro Dry air filters

Quick question for you guys. Which filter would you recommend using for the Eurobox (OEM Euro spec 330/325 intake with cone filter)? To my understanding the oiled K&N filters can cause some issues with the MAF sensors (not sure how true this is). Is the AFE Pro Dry filter a good alternative and worth the extra cost? The vehicle is a US Spec N52 with eurobox.
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      02-07-2013, 11:41 AM   #2
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Quote:
Originally Posted by MonsterM View Post
Quick question for you guys. Which filter would you recommend using for the Eurobox (OEM Euro spec 330/325 intake with cone filter)? To my understanding the oiled K&N filters can cause some issues with the MAF sensors (not sure how true this is). Is the AFE Pro Dry filter a good alternative and worth the extra cost? The vehicle is a US Spec N52 with eurobox.
I been using K&N since day one of getting the Eurobox and have had no issues. Just clean your MAF like once a month and you will be g2g.

spray the MAF with this to clean it

http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_x_7070079-P_x_x?cm_mmc=ACQ-_-Google-_-enhancedRM-_-7070079&ci_src=17588969&ci_sku=7070079&ci_gpa=pla& ci_kw={keyword}&gclid=CLX9mebRpLUCFQ2i4AodiAcAPQ
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      02-07-2013, 12:14 PM   #3
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I have no problems with my K&N filter. The key is to not oversoak the filter and you will be fine.
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      02-07-2013, 12:16 PM   #4
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I've been using K&N for years, never once had a problem.

When you clean it, after using the cleaner / rinsing it with water, let it dry for 24 hours. Apply oil generously but don't dunk it in a vat of oil and you'll be fine. I clean my filter twice a year.
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      02-07-2013, 03:37 PM   #5
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Quote:
Originally Posted by MonsterM View Post
Quick question for you guys. Which filter would you recommend using for the Eurobox (OEM Euro spec 330/325 intake with cone filter)? To my understanding the oiled K&N filters can cause some issues with the MAF sensors (not sure how true this is). Is the AFE Pro Dry filter a good alternative and worth the extra cost? The vehicle is a US Spec N52 with eurobox.
AFE Pro Dry FTW!!!

It's the exact same thing as the AEM Dryflow filters, and I've used those on other vehicles I've owned for years. Some of those vehicles I even compared the difference between an oiled K&N with the Dryflow and never noticed one bit of reduced performance with the Dryflow.

I'll never oil another filter again. They rule.

Any LMAO at the guy who's all "just clean your MAF once a month and you'll be good". Who the hell wants to do that???
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      02-07-2013, 03:44 PM   #6
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I am yet to install my dry aFe & box, will do it on Friday night/weekend. If you can wait i'll post impressions

I liked Desi4life's idea of buying 2 k&n to swap, while you clean the other
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      02-07-2013, 07:12 PM   #7
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Quote:
Originally Posted by rattmobbins View Post
AFE Pro Dry FTW!!!

It's the exact same thing as the AEM Dryflow filters, and I've used those on other vehicles I've owned for years. Some of those vehicles I even compared the difference between an oiled K&N with the Dryflow and never noticed one bit of reduced performance with the Dryflow.

I'll never oil another filter again. They rule.

Any LMAO at the guy who's all "just clean your MAF once a month and you'll be good". Who the hell wants to do that???
Actually my MAF never had any debris on it even if I don't clean if for months. But why not spray it down just to make sure its g2g, the process takes like 5min.
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      02-08-2013, 08:09 AM   #8
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Quote:
Originally Posted by andrey_gta View Post
I am yet to install my dry aFe & box, will do it on Friday night/weekend. If you can wait i'll post impressions

I liked Desi4life's idea of buying 2 k&n to swap, while you clean the other
Report back with your findings! I'll wait lol.
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      02-08-2013, 08:37 AM   #9
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I've used cone k&n filters and flat ones with no problems, before install I always get my big leaf blower and blow the opposite direction for a while and use the nylon k&n cover. *Won't it restrict?* honestly no, it's hairline thin, gets your fine dust off and repels water awesome. I'd say 4k miles still looks brand new.

My next filter to try is Green Filter cones but haven't found the right size inlet flange yet. This is for gruppe-m replica intake not eurobox/PI.
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      02-08-2013, 05:33 PM   #10
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Quote:
Originally Posted by Delta0311 View Post
Actually my MAF never had any debris on it even if I don't clean if for months. But why not spray it down just to make sure its g2g, the process takes like 5min.
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      02-09-2013, 11:49 PM   #11
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Quote:
Originally Posted by MonsterM View Post
Report back with your findings! I'll wait lol.
in short, i love it.

Its more aggressive, compared to USA airbox with regular filter and intact charcoal filter. More impressions here: http://www.1addicts.com/forums/showp...&postcount=401

The filter installs different than OEM euro filter. The euro Dry aFe is missing alot of the front "Nose" but it has grooves to slide into the + shaped holders in the eurobox

For you, it may be more like a refinement, so you cant go wrong with w.e filter you select.
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      02-10-2013, 09:38 AM   #12
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Quote:
Originally Posted by andrey_gta View Post
in short, i love it.

Its more aggressive, compared to USA airbox with regular filter and intact charcoal filter. More impressions here: http://www.1addicts.com/forums/showp...&postcount=401

The filter installs different than OEM euro filter. The euro Dry aFe is missing alot of the front "Nose" but it has grooves to slide into the + shaped holders in the eurobox

For you, it may be more like a refinement, so you cant go wrong with w.e filter you select.
Thanks! I think the tune, eurobox and the exhaust really make a huge difference to this car.
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