what exactly does this do

magic77 · 02-21-2012, 06:35 PM

Just wondering about this hose off the airbox if anyone knows

In real oem its item 10 on this page

Listed as SUCTION SILENCER/FILTER CARTRIDGE
any ideas how this function and is it really needed.

If its just there to make the induction noise quiter they why would I want it

thanks in advance

m1bjr · 02-22-2012, 09:53 AM

Could be a 'tuned' stub to reduce resonant noises I guess.

A Helmholtz resonator?

Not connected to anything then?

magic77 · 02-22-2012, 05:46 PM

connects to the air box underneath if I recall from when I had the bumper off to do the brake ducts

02-21-2012, 06:35 PM	#1
magic77 Brigadier General 264 Rep 3,815 Posts Drives: ex- 335i Join Date: Apr 2009 Location: Surrey iTrader: (2)	what exactly does this do Just wondering about this hose off the airbox if anyone knows In real oem its item 10 on this page Listed as SUCTION SILENCER/FILTER CARTRIDGE any ideas how this function and is it really needed. If its just there to make the induction noise quiter they why would I want it thanks in advance __________________ F30 335i M Sport - now departed
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02-22-2012, 09:53 AM	#2
m1bjr LSD - No, you're not seeing things 75 Rep 3,302 Posts Drives: Baby F36 Gran Coupe Join Date: Mar 2010 Location: Plymouth UK iTrader: (4)	Could be a 'tuned' stub to reduce resonant noises I guess. A Helmholtz resonator? Not connected to anything then? __________________
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02-22-2012, 05:46 PM	#3
magic77 Brigadier General 264 Rep 3,815 Posts Drives: ex- 335i Join Date: Apr 2009 Location: Surrey iTrader: (2)	connects to the air box underneath if I recall from when I had the bumper off to do the brake ducts __________________ F30 335i M Sport - now departed
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