Aftermarket Air Intake ? - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 09-05-2005, 02:03 AM
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can you replace the stock air filter with a cone style aftermarket one ? theres an awful lot of gear on the stock intake. could the huge cluster of equipment be replaced by just an intake tube and filter.

thanks.

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#2 (permalink) Old 09-06-2005, 09:36 PM
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What motor/setup? Plenty of people just replace the airbox with a cone filter, even though it loses HP once the engine warms up.. make a custom airbox for your cone filter and you'll be golden.

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#3 (permalink) Old 09-06-2005, 11:29 PM
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You can not replace the AFM with a tube, the car will not run. And like the other poster said, you will loose HP when the car warms up. Your best bet is to just take the snorkel out of the inside of the air box and put a K&N panel filter in the stock box. Unless you want to spend $800 to do a proper AFM to AFS swap.
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#4 (permalink) Old 09-08-2005, 08:37 PM
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looks like you could leave the sensor and just remove the filter box, then replace the box with a cone, without the plastic cover behind the headlights it looks like you would get plenty of cool air in, if you wanted to go one step further you could remove the high beam headlight to allow direct air flow to the engine compartment for the cone filter. :

AND you could place an intake funnel behind the headlight opening for the cone filter.
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#5 (permalink) Old 09-12-2005, 06:56 PM
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yea i was thinking of doing that would that work and give a some horsepower gain?
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#6 (permalink) Old 09-12-2005, 11:39 PM
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worked fine. i put a 4/12" open end cone filter on the end after all the factory gear and cleaned the TB while i was at it, took about a half hour to fit everything together. also painted my rear seat (it medium and dark gray) black with my rear deck cover, looks great. the carpet is next. it's fun to play with since it only cost a grand.

85 318i 1.8 122K
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