Drop-in engine air filter advice.

DropTopKingM3 · 09-08-2023, 04:37 AM

Hey guys, what’s the consensus on drop in air filters for the x5 40i xdrive? K&N or BMC ?

I may end up doing the race chip or JB4 (whichever is simpler).

Thanks in advance.

cobramite · 09-08-2023, 04:40 PM

Quote:

Originally Posted by DropTopKingM3

Hey guys, what’s the consensus on drop in air filters for the x5 40i xdrive? K&N or BMC ?

I may end up doing the race chip or JB4 (whichever is simpler).

Thanks in advance.

Save the money on filters and put it towards a piggyback.

BobsM3Coupe · 09-08-2023, 07:48 PM

Those aftermarket air filters just let in larger particles which isn't good for the engines longevity. But some people like them for the added intake sound.

slicky · 09-08-2023, 08:56 PM

Poor filtration, filter oil mass flow air sensor contamination, having to clean the filter every 10k miles (optimistically) for no power gain and a tiny bit more noise? If yo tune for it, there may be a horsepower or two to be found at the redline. Is it really worth it?

DropTopKingM3 · 09-09-2023, 12:13 AM

Thanks for the heads up guys. Maybe I’ll just do an OE Hengst filter replacement.

09-08-2023, 04:37 AM	#1
DropTopKingM3 ... space for rent .. 118 Rep 560 Posts Drives: E46 M3 // G05 X5 Join Date: Apr 2007 Location: NY iTrader: (0)	Drop-in engine air filter advice. Hey guys, what’s the consensus on drop in air filters for the x5 40i xdrive? K&N or BMC ? I may end up doing the race chip or JB4 (whichever is simpler). Thanks in advance.
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09-08-2023, 07:48 PM	#3
BobsM3Coupe Brigadier General 1456 Rep 3,931 Posts Drives: X5MC Join Date: Nov 2009 Location: California iTrader: (4)	Those aftermarket air filters just let in larger particles which isn't good for the engines longevity. But some people like them for the added intake sound.
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09-08-2023, 08:56 PM	#4
slicky Second Lieutenant 122 Rep 208 Posts Drives: Cadilac ATS-V Join Date: Sep 2022 Location: Mt. Prospect IL iTrader: (0)	Poor filtration, filter oil mass flow air sensor contamination, having to clean the filter every 10k miles (optimistically) for no power gain and a tiny bit more noise? If yo tune for it, there may be a horsepower or two to be found at the redline. Is it really worth it? Last edited by slicky; 09-09-2023 at 07:38 AM..
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09-09-2023, 12:13 AM	#5
DropTopKingM3 ... space for rent .. 118 Rep 560 Posts Drives: E46 M3 // G05 X5 Join Date: Apr 2007 Location: NY iTrader: (0)	Thanks for the heads up guys. Maybe I’ll just do an OE Hengst filter replacement.
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