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K an N air filter

Discussion in 'Performance and Tuning' started by Steplift20, Apr 28, 2021.

  1. Apr 28, 2021 at 2:12 PM
    #1
    Steplift20

    Steplift20 [OP] New Member

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    I have a 2018 5.7 engine,I have 14.000 miles and want to change my air filter, I was thinking about a K N in box air filter is anyone using it? Do you see a differance? Is it worth the extra money ? Thanks
     
  2. Apr 28, 2021 at 3:46 PM
    #2
    Rocko9999

    Rocko9999 New Member

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    No oil-too much of a PITA. Get a dry filter.
     
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  3. Apr 28, 2021 at 4:17 PM
    #3
    batman900

    batman900 Yep

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    I grabbed a TRD (basically the same thing) hoping for a little more engine noise. Zero difference in noise, feel, mpg etc. Just grab another paper IMO.
     
  4. Apr 28, 2021 at 4:41 PM
    #4
    TundraTeddy

    TundraTeddy New Member

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    In order to get the more growl, I think you need the whole box. Mine came with the whole TRD box and filter, but it also has the TRD exhaust. Maybe that helps as well, but it's definitely throatier compared to stock.
     
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  5. Apr 28, 2021 at 4:44 PM
    #5
    batman900

    batman900 Yep

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    I think so too, I put the whole TRD intake on my wife's 4Runner and it sounds great, I'll probably go that route next myself.
     
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  6. Apr 28, 2021 at 4:46 PM
    #6
    TundraTeddy

    TundraTeddy New Member

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    How much you get it for? My wife just got a 4runner as well, and was thinking of doing the same! Only thing is that she has a heavy foot, she loves the torque on it, but I'm afraid she'll love it more and step on it more hahaha.
     
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  7. Apr 28, 2021 at 4:48 PM
    #7
    TundraTeddy

    TundraTeddy New Member

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    To answer your question, I got that same K&N filter for my 2012 Tundra years back. It made a slight difference, but nothing compared to what I mentioned above, but that's a full on TRD combination. Love the sound on it now.
     
  8. Apr 28, 2021 at 4:53 PM
    #8
    batman900

    batman900 Yep

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    I don't blame you, my wife is the same way. I pieced it together using a thread with part numbers somewhere on the toyota-4runner forums and I think it came out to around 260ish from the BAM wholesale website. Apparently piecing it together is cheaper than buying the whole kit. You will need like 3 feet of vacuum hose also because the stock is too short $1.25 and I chose to get the MAF sensor wiring extender $35 rather than splice up the wire looming like the directions say to do. So all in it came to like $300. Can't remember what the extender was called but it's mentioned in that long thread. I'm sure prices are probably a bit higher now 8 months later but I can say it was worth it, just sounds fantastic and looks good in the engine bay.
     
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  9. Apr 28, 2021 at 4:54 PM
    #9
    Azblue

    Azblue Beer is Good Ban Moderator

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    The Dirty T
    A K&N filter will let more dirt/dust get into your engine, make more noise, and possibly screw up your sensors.

    It will not increase HP or MPG.
     
  10. Apr 29, 2021 at 5:45 AM
    #10
    Steplift20

    Steplift20 [OP] New Member

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    I heard that it foes let bigger particles of dirt threw and you just confirmed it, I will get a paper filter. Do you have a good one go get? Is walmart brand ok?
     
  11. Apr 29, 2021 at 5:45 AM
    #11
    Steplift20

    Steplift20 [OP] New Member

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    I heard that it foes let bigger particles of dirt threw and you just confirmed it, I will get a paper filter. Do you have a good one go get?
     
  12. Apr 29, 2021 at 8:02 AM
    #12
    TundraTeddy

    TundraTeddy New Member

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    Your local auto parts will do, unless you want to pay extra for the "oem" from toyota.. which does the exact same job.
     
  13. Apr 29, 2021 at 8:05 AM
    #13
    Black Wolf

    Black Wolf Bigfoot Hunter, Sasquatch too, but not Yeti

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    Never had any of those issues using K&N's. Ever. Been using them since the early 70's. Using one now. Millions of folks use K&N's with no issues. No filter really ever improves hp or mpgs.
     
    Last edited: Apr 29, 2021
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  14. Apr 29, 2021 at 8:57 AM
    #14
    Oats87

    Oats87 Dirt Rider

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    Frankly, the OE filters really are not that expensive, and if your local dealer participates in https://parts.toyota.com then you can order it from there for local pickup and most of the time end up getting a nice discount on the parts. I spend a TON of time off road in the Sierras, and deal with the what I call Sierra Silt... the only filter that I would actually trust to filter out this stuff is an OE paper filter. If you're not running your truck in extremely dusty conditions you would probably be better off with an aftermarket filter, but this is one area I personally do not like cheaping out on.

    I've purchased (through my supercharger kit) a K&N filter, which I immediately knew I wouldn't run, as well as an AFE Pro-S Dry filter. Both of these filters do not pass my light test, which is holding a very bright light up behind them and looking for pinholes. Pin holes == places for fine particulate to come through. Of course, the "clean" side of the air filter will never be held to clean room standards, but I've seen plenty of stories of folks running K&N filters and ending up with a fine dust getting past the filter. To add to this, oiled filters can "leech" oil onto the MAF sensor and cause running problems in that area.

    One thing to note is the TRD air filters are notorious in the supercharged world for bowing in and letting unfiltered air get around the edges, so something to keep in mind if you're running one of those in those "severe duty" conditions.

    Note that there are two different air filters, the "panel style" that is used for 2007-2013 trucks (and 2014+ trucks that have Magnuson/TRD superchargers installed).

    For 2007-2013 (and all Magnuson/TRD supercharged) trucks: 17801-0S010 https://parts.toyota.com/p/Toyota__/Air-Filter/63071308/178010S010.html
    For 2014+ trucks: 17801-0P100 https://parts.toyota.com/p/Toyota__/Air-Filter/66801543/178010P100.html
     
  15. Apr 29, 2021 at 9:03 AM
    #15
    MSU Tundra

    MSU Tundra Numerous rodeos experienced

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  16. Apr 29, 2021 at 9:09 AM
    #16
    Oats87

    Oats87 Dirt Rider

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    What is linked is an oiled filter, not a dry filter.
     
  17. Apr 29, 2021 at 9:14 AM
    #17
    Rocko9999

    Rocko9999 New Member

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    Shoot, thought it was a different filter. Sorry.
     
  18. Apr 29, 2021 at 10:28 AM
    #18
    Azblue

    Azblue Beer is Good Ban Moderator

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    The Dirty T

    It doesn't help that I live in a dry, dusty desert. I have run them in the past also and you can actually see the fine particles that get by it on the "clean" side of the intake. Maybe a K&N is OK for street use in other climates, but not here.
     
  19. Apr 29, 2021 at 10:28 AM
    #19
    MSU Tundra

    MSU Tundra Numerous rodeos experienced

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    The link takes you to the page where you can choose a dry filter. That's the one I'd recommend.
     
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  20. Apr 29, 2021 at 10:30 AM
    #20
    Black Wolf

    Black Wolf Bigfoot Hunter, Sasquatch too, but not Yeti

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    LOL. I've been around a lot of dust over the past 50 years. Nothing worse than Nevada alkali silt. No issues then either. K&N's come in all sizes and not all air boxes are alike either. Wet filter issues regardless of brand, and there are many, are usually do to over oiling and/or a bad air box seal. The wet TRD is a bad clone of the K&N btw.
     
    Last edited: Apr 29, 2021
  21. Apr 29, 2021 at 10:34 AM
    #21
    Azblue

    Azblue Beer is Good Ban Moderator

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    The Dirty T
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  22. Apr 29, 2021 at 10:44 AM
    #22
    Skey44

    Skey44 GreenvilleOverland

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    The k&n lie is a good one. Just replace the stock one frequently! My local dealer can’t see dust in filter FYI. I replaced mine and they just fail to see it. Would rather have you replace the in cabin air filter. When I want my engine air moving and clean!
     
  23. Apr 29, 2021 at 10:59 AM
    #23
    Rocko9999

    Rocko9999 New Member

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  24. Apr 29, 2021 at 2:55 PM
    #24
    eagleguy

    eagleguy New Member

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    Played around with different types of air filters for my BBC. Found that the OEM paper had much better air flow and the engine sounded better when compared to K&N and similar with all the fancy wording making you think you were gaining horse power. That said the OEM one is fine and when replacement is due I will go with WIX/Nappa Gold paper like OEM, (same item).
     
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  25. Apr 29, 2021 at 4:10 PM
    #25
    alpinepro4

    alpinepro4 What is your MPG Today!

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    Dammit I just purchased AFE pro dry S filter. I should have stuck with paper filter. Can’t return it now. Anyone had problems with AFE Pro dry S filter? Don’t want excess particulate in my motor.
     
  26. Apr 29, 2021 at 4:34 PM
    #26
    Black Wolf

    Black Wolf Bigfoot Hunter, Sasquatch too, but not Yeti

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    I have serious reservations with the methodology used in that video. Junk science. Before I get to that let's be clear about this......all aftermarket air filter manufacturers claim their filters to meet or exceed OEM filters. They claim increased airflow, better filtration media, and most claim that "many" vehicles, as in not all, see increased HP. Sure....very small gains in HP at near WOT. Nobody drives at WOT all the time and I find that dubious at best when K&N and all the others that also make such claims. Now let's get to the nitty and gritty fine print. All filters are given an efficiency percentage at X value in microns. Example: 98.7% efficiency @ 20 microns. A filter will have been industry spec tested under highly controlled conditions to be 98.7% efficient preventing particulates to 20 millionths of an inch. Pretty damn small. Surgical masks can go to 3 microns. Not mentioned in the video at all. What were the efficiency specs for each filter? :notsure:
    Now....methodology issue. I liked the thought process. Test Fixture, anemomter, manometer, and partical counter. Fine, although the partical counter was quite low end.We calibrate all three test instruments in our calibration laboratories. We calibrate many various size anemometers, digital and sight glass manometers, and partical testers that cost over $12K! We don't use a flashlight in the calibration process. The largest red flag besides not mentioning each filter efficiency specs was the willy nilly application of the contaminant media as in....un sifted flour. Seriously! Any contaminate needs to be sifted first and applied equally to each filter media. We have calibrated sifters. We calibrate customer sifters. The control was lost RIGHT THEN! Poor methodology. We have a process validation group that travels all over. They would have serious reservations with the process used in that video. I myself have been involved with measurement science for over 40 years. I think I might be qualified to comment on this. As for my use of K&N's, decent filtration that meets industry efficiency tests and reusable. Nothing more nothing less. When and if I ever spent time in extreme dusty silt conditions for a period of time I pop the hood and check the filter. Any filter. What is the ideal filter? A highly multi filter media layered constrictive one that's 99% efficient to 5 microns which is 5 millionths"? Do you folks realize how small that is? How about a less constructive type filter with less filter media layers that are good to 20 microns or 20 millionths? Do you know how small that is? Still pretty damn small. I truly dislike junk science. That video was a feeble attempt at best. Buy a filter for your needs. Raise your hood and check your filter, your air box seal, your MAF. Snarky comments are kuul but not based in science. My 2 cents.:burnrubber:
     
    Last edited: Apr 29, 2021
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  27. Apr 29, 2021 at 4:36 PM
    #27
    Black Wolf

    Black Wolf Bigfoot Hunter, Sasquatch too, but not Yeti

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    You have a very good filter.
     
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  28. Apr 29, 2021 at 5:02 PM
    #28
    alpinepro4

    alpinepro4 What is your MPG Today!

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    How often do you check your MAF sensor? Or do you really need to check it at all?
     
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  29. Apr 29, 2021 at 5:24 PM
    #29
    Black Wolf

    Black Wolf Bigfoot Hunter, Sasquatch too, but not Yeti

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    Twice a year. Especially after hunting season because it does get a bit dusty up in the mountains. It's always clean. I've posted a pic of my MAF on my build thread. My 07 had a K&N. At 5 years.....spotlessly clean but then I oil my filter properly which is not rocket science. I checked the throttle body on my 14 when I bought it. It was dirty after 5 years in ND. I'd check yours once a year. MAF and throttle body are easy to clean. CRC has a combo twin pack. One can for cleaning your MAF and the other for cleaning your TB. Takes an hour tops if you have a beer while doing it..
     
  30. Apr 29, 2021 at 5:31 PM
    #30
    Vizsla

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    I have tried AFE Pro dry, TRD, K&N, and Wix, all pulled way too much dust through. OEM does not. That’s extreme use off road though. AFE lists the intended use for their filters, light off-road for the dry, 5r which is similar to K&N/TRD street/track. Wish AFE made the Pro-GAURD 7 for the Tundra, best filter I’ve used.
    https://afepower.com/stock-replacement-and-universal-performance-air-filters
     
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