K&N Air Filter Vs. OEM

valdivita · 08-11-2008, 03:08 PM

Could anybody tell me if there's a big difference in between the OEM (BMW part number 13717542294) Air filter and the K&N filter (33-2332). If so, would the air intake sensor give me problems when replacing it?

simp0man · 08-12-2008, 12:04 AM

Air intaks sensor, you MAF(mass-air-flow) sensor. That was my first mod for improved performance. No worries. Just don't over do the oil spray or you will fuk the MAF and that is when the dealer can say you made a mod that caused an actual malfunction.

hotrod182 · 08-12-2008, 03:11 PM

I made a bunch of runs switching the K&N in and out, noticed no difference whatsoever. Infact, my best trap was with the stock air filter. My 12.13 at the drag strip was with a totally stock air filter as well. But let me know if you want to buy my near new K&N, still in the orig box. I only used it a few hours.

But in all fairness, its not really the fault of the K&N. There have been numerous dyno tests showing almost no difference between running a filter and no filter at all.

simp0man · 08-14-2008, 12:02 AM

I think a ram air scoop will help the K&N filter.

08-11-2008, 03:08 PM	#1
valdivita V-MER 43 Rep 294 Posts Drives: E93 335CiC Join Date: Jan 2008 Location: North Dallas iTrader: (4)	K&N Air Filter Vs. OEM Could anybody tell me if there's a big difference in between the OEM (BMW part number 13717542294) Air filter and the K&N filter (33-2332). If so, would the air intake sensor give me problems when replacing it?
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08-12-2008, 12:04 AM	#2
simp0man Not looking 2 SPEED, just looking GOOD 45 Rep 2,516 Posts Drives: 07 328i Join Date: Apr 2007 Location: Stockton, Ca iTrader: (1) Garage List 2007 328i [0.00]	Air intaks sensor, you MAF(mass-air-flow) sensor. That was my first mod for improved performance. No worries. Just don't over do the oil spray or you will fuk the MAF and that is when the dealer can say you made a mod that caused an actual malfunction. __________________
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08-12-2008, 03:11 PM	#3
hotrod182 . 812 Rep 3,974 Posts Drives: 2023 i4 M50 Join Date: Dec 2006 Location: California iTrader: (0)	I made a bunch of runs switching the K&N in and out, noticed no difference whatsoever. Infact, my best trap was with the stock air filter. My 12.13 at the drag strip was with a totally stock air filter as well. But let me know if you want to buy my near new K&N, still in the orig box. I only used it a few hours. But in all fairness, its not really the fault of the K&N. There have been numerous dyno tests showing almost no difference between running a filter and no filter at all. __________________ 2011 Alpine 335d M-Sport 12.34 @ 110.48mph 2019 i3s Terra, 2008 Black 335i Sedan. 11.11@ 129.47 mph 2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph, 60-130mph: 6.95 seconds 2023 i4 M50 11.48 @ 121.56mph, 3.43 0-60 (dragy)
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08-14-2008, 12:02 AM	#4
simp0man Not looking 2 SPEED, just looking GOOD 45 Rep 2,516 Posts Drives: 07 328i Join Date: Apr 2007 Location: Stockton, Ca iTrader: (1) Garage List 2007 328i [0.00]	I think a ram air scoop will help the K&N filter. __________________
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