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Thread: Show me your MFI aircleaner alternatives

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  1. #1

    Show me your MFI aircleaner alternatives

    I hope this isn't redundant, but I couldn't find any similar threads. Over the years I have seen a number of options to the stock MFI aircleaner and snorkel although most of these were in racecars. For the most part if my memory serves me correctly...the ITG triples and single foam filters are what I have seen the most, but there certainly are a miriad of choices out there. For the purists, the factory aircleaner configuration is more than satisfactory. But apparently there are some among us that like to "go against the grain" at times. It would be interesting to have a resource that chronicles the aircleaner options for those of us that might head down that path. Let 'er rip.....
    registry# 1283

  2. #2
    Moderator Chuck Miller's Avatar
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    Reseda, CA.

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    Think'n about this for years ....
    Chuck Miller
    Creative Advisor/Message Board Moderator - Early 911S Registry #109
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  3. #3
    Senior Member
    Join Date
    Jul 2015
    Many years ago I did a dyno comparison and found that the stock air cleaner/box is worth some horsepower over something not stock or even over slapping a foam or paper filter over the stacks. It seems as if the air flow inside the box has something to do with HP.
    I would bet that Porsche did some aero work way back in the day.

  4. #4
    Junior Member Bahman's Avatar
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    Jan 2021
    Greensboro NC
    K&N shorts, with rain shield, adapted to the MFI stacks. Better breathing (70+ rpm) and awesome sound.

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    1972 911E Targa, Mostly Original
    2002 Porsche 996 C4 Cabriolet
    2005 Turbo-converted MINI Cooper S

  5. #5
    While I don’t doubt that the stock filter is better than any aftermarket options, is sure does hide a lot of an interesting engine. I don’t think that most of us would notice any drop in power from something like we see for the Weber’s. Sure, you would loose the ability to set your car on fire with the stock cold start system, but who still uses that “accident waiting to happen”. I’m surprised no one has offered up an aluminum set. Seems like their would be a market.
    1969 911S
    1969 Datsun 2000...worth less, but more valuable

  6. #6
    Senior Member
    Join Date
    Sep 2009
    Aluminium cut plates. K & N filters and ebay springs.

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