1. Welcome to Tundras.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tundra discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Tundra owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Air box question.

Discussion in '1st Gen Tundras (2000-2006)' started by jcrob33, Jun 23, 2020.

  1. Jun 23, 2020 at 7:28 AM
    #1
    jcrob33

    jcrob33 [OP] New Member

    Joined:
    May 23, 2020
    Member:
    #46991
    Messages:
    98
    First Name:
    JR
    Vehicle:
    2004 Toyota Tundra DC // 280k+
    So I have a 04 tundra and a 03 sequoia.

    I was poking around the tundra last night and noticed there is like an extra air filter in the air box? Do you guys have this?

    I looked at my wife’s sequoia, and it doesn’t have that extra filter thing.

    so I ripped it out. Maybe I’ll regret that, but it seems weird to have an extra filter thing. It must have been original because it was mounted in.


    What the heck is this thing?
    Maybe my truck will breath better now?
     
  2. Jun 23, 2020 at 7:29 AM
    #2
    TX-TRD1stGEN

    TX-TRD1stGEN I'm not taking a knee

    Joined:
    Sep 12, 2017
    Member:
    #9618
    Messages:
    646
    Gender:
    Male
    First Name:
    Seth
    South East Texas
    Vehicle:
    2000 Tundra 4x4
    It's for emissions. Leave it out.
     
  3. Jun 23, 2020 at 7:45 AM
    #3
    jcrob33

    jcrob33 [OP] New Member

    Joined:
    May 23, 2020
    Member:
    #46991
    Messages:
    98
    First Name:
    JR
    Vehicle:
    2004 Toyota Tundra DC // 280k+
    This thingy.

    F2DBB0DB-E181-4361-B200-368C1B3A7981.jpg
     
  4. Jun 23, 2020 at 7:51 AM
    #4
    04DCTundraMan

    04DCTundraMan New Member

    Joined:
    Jun 3, 2020
    Member:
    #47489
    Messages:
    131
    Gender:
    Male
    First Name:
    Ryan
    Vehicle:
    2004 Salsa Red Tundra Limited DC
    Welp now I gotta go look in my truck haha! Never noticed that. Always just change filters and move on.
     
    Hooptytrix and Rica25 like this.
  5. Jun 23, 2020 at 8:21 AM
    #5
    tvpierce

    tvpierce New Member

    Joined:
    May 6, 2019
    Member:
    #30129
    Messages:
    517
    Maine
    Vehicle:
    2000 Tundra AC
    It's to absorb fuel vapor when the engine is turned off. It won't effect the performance in any way, and will help keep your air intake quieter under hard acceleration.
     
  6. Jun 23, 2020 at 8:28 AM
    #6
    Darkness

    Darkness Allergic to white

    Joined:
    Jul 23, 2018
    Member:
    #17315
    Messages:
    4,316
    Gender:
    Male
    First Name:
    Luis
    All over SoCal
    Vehicle:
    The darkest
    It's really dark
    Toyota inserted those for one reason and only one reason: to start controversial forum threads.

    It seems to be working! Quick yank it and throw it out before it happens again!
     
  7. Jun 23, 2020 at 8:30 AM
    #7
    FirstGenVol

    FirstGenVol New Member

    Joined:
    Dec 13, 2018
    Member:
    #22934
    Messages:
    4,700
    First Name:
    Erik
    TN
    Vehicle:
    2002 SR5 4x4 AC
    ICON, SPC UCA's, SCS Ray 10's
    When I went to remove mine last year it was already gone. I guess the original owner made the same decision.
     
  8. Jun 23, 2020 at 10:30 AM
    #8
    bmf4069

    bmf4069 Yup, that's car parts in a dishwasher

    Joined:
    Sep 1, 2018
    Member:
    #18880
    Messages:
    2,055
    Gender:
    Male
    TX
    Vehicle:
    02 AC sr5 4wd v8
    I disagree! Take it out and burn so the trapped fuel vapors don't get out! For whirled peaches!
     
  9. Jun 23, 2020 at 3:09 PM
    #9
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

    Joined:
    Apr 29, 2018
    Member:
    #14878
    Messages:
    9,017
    Gender:
    Male
    First Name:
    Fred
    ‘Somewhere’... a State of Mind
    Vehicle:
    2002 Tundra SR5 4WD 4.7L AC Silver Metallica
    Hand Protectors
    It also keeps the gas/exhaust vapors off the (say it with a lisp) Sensitive Mass Air Flow Sensor that seep back from the Throttle Body after engine is turned off. I’ll be keeping mine in place for Carbon Credit build up points.
     
    bmf4069 and Hooptytrix like this.
  10. Jun 23, 2020 at 3:10 PM
    #10
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

    Joined:
    Apr 29, 2018
    Member:
    #14878
    Messages:
    9,017
    Gender:
    Male
    First Name:
    Fred
    ‘Somewhere’... a State of Mind
    Vehicle:
    2002 Tundra SR5 4WD 4.7L AC Silver Metallica
    Hand Protectors
    A little Horned Toad just got the Black Lung because you removed this.
     
    bmf4069, Snaz and Darkness like this.
  11. Jun 23, 2020 at 6:04 PM
    #11
    toyoboyo

    toyoboyo New Member

    Joined:
    Jul 16, 2019
    Member:
    #33306
    Messages:
    233
    Gender:
    Male
    I installed an intake on my 05 sequoia and stumbled upon that pre-filter thing.

    I now see it's use. There is so much crud getting inside my airbox due to my climate (desert). That thing i'm assuming is for extra filtration and to act as a sound resonator. I ended up purchasing a mesh sleeve that goes over my cone filter for extra protection.

    My Sequoia has an annoying intake howl when going on long trips uphill or towing heavy. That thing tremendously helps with noise.
     
  12. Jun 23, 2020 at 7:49 PM
    #12
    jcrob33

    jcrob33 [OP] New Member

    Joined:
    May 23, 2020
    Member:
    #46991
    Messages:
    98
    First Name:
    JR
    Vehicle:
    2004 Toyota Tundra DC // 280k+
    I’m actually hoping that I’ll see better MPG with taking it out...

    And adding a KN drop-in.
     
  13. Jun 24, 2020 at 3:15 AM
    #13
    tvpierce

    tvpierce New Member

    Joined:
    May 6, 2019
    Member:
    #30129
    Messages:
    517
    Maine
    Vehicle:
    2000 Tundra AC
    It's not.

    It does... although that's not its primary function.

    I have a K & N "cold air intake" on my 2000 Tundra. All it does is make more noise -- and an annoying noise at that.
     
  14. Jun 24, 2020 at 3:31 AM
    #14
    TundraMcGov.

    TundraMcGov. Your friend. Your foe. Not yo Ho.

    Joined:
    Nov 23, 2018
    Member:
    #22089
    Messages:
    981
    Gender:
    Male
    First Name:
    Jofus
    Burpinham, Babalama
    Vehicle:
    2017 Super White DC 4X4 Tundra
    If you remove your Tundra pre-filter than all I ask is that you fashion a modified air box and install it on your lawn mower. Offsets Baby. Gotta keep the polar bears and baby seals living long long lives.
     
  15. Jun 24, 2020 at 9:37 AM
    #15
    toyoboyo

    toyoboyo New Member

    Joined:
    Jul 16, 2019
    Member:
    #33306
    Messages:
    233
    Gender:
    Male
    I cant say my truck gained overall power, but theres an undeniable power/torque increase under partial throttle vs stock.

    Flooring it sees no more HP, partial throttle yes. Did you notice this too or nothing at all?
     
  16. Jun 24, 2020 at 10:59 AM
    #16
    tvpierce

    tvpierce New Member

    Joined:
    May 6, 2019
    Member:
    #30129
    Messages:
    517
    Maine
    Vehicle:
    2000 Tundra AC
    The K&N was on my truck when I bought it. It's highly unlikely yours is giving you more power or torque at partial throttle -- it's just not designed to do that. At partial throttle, OEM air intake wasn't the most restrictive part of the intake, the butterfly in the throttle was -- and still is. My guess is that the perceived power/torque increase is a result of the increase in intake noise.
     
  17. Jun 24, 2020 at 12:26 PM
    #17
    Darkness

    Darkness Allergic to white

    Joined:
    Jul 23, 2018
    Member:
    #17315
    Messages:
    4,316
    Gender:
    Male
    First Name:
    Luis
    All over SoCal
    Vehicle:
    The darkest
    It's really dark
    I'd like to trade in my lawn mower for a small pack of pigmy goats.
    [​IMG]
     
  18. Jun 24, 2020 at 12:52 PM
    #18
    FirstGenVol

    FirstGenVol New Member

    Joined:
    Dec 13, 2018
    Member:
    #22934
    Messages:
    4,700
    First Name:
    Erik
    TN
    Vehicle:
    2002 SR5 4x4 AC
    ICON, SPC UCA's, SCS Ray 10's
    My buddy had some goats like that. Fun to watch but total dicks. They like to ram humans too. He had a giant Great Pyrenees that loved to guard them. I once looked out his window at the goats and the dog was laying down on his side while the goat bounced up and down on him like a trampoline. It was great.
     
    Darkness likes this.
  19. Jun 24, 2020 at 2:03 PM
    #19
    Darkness

    Darkness Allergic to white

    Joined:
    Jul 23, 2018
    Member:
    #17315
    Messages:
    4,316
    Gender:
    Male
    First Name:
    Luis
    All over SoCal
    Vehicle:
    The darkest
    It's really dark
    I would train one to be like this guy :mad:
     
    FirstGenVol likes this.
  20. Jun 24, 2020 at 9:05 PM
    #20
    toyoboyo

    toyoboyo New Member

    Joined:
    Jul 16, 2019
    Member:
    #33306
    Messages:
    233
    Gender:
    Male
    There's definitely an increase. Mine has the VVTI motor. By partial throttle I mean 10-15% light footing it. It pulls through the rpms quicker and smoother. That's not enough throttle to make the intake growl.

    Not sure if you're into performance tuning but on several car platforms there are mods that make their HP/TQ increases "under the curve" vs peak power @ redline. So it will show when you overlay dyno sheets that a modification increased HP/TQ by say 15 from 2000rpm-5000rpm but by the time it gets to redline there is only a 1-3HP increase.


    Now I'm not saying that's the case with our trucks, I don't have any dyno charts or numbers but there's definitely a seat of the pants difference.
     
  21. Jun 24, 2020 at 9:59 PM
    #21
    Inquiringone

    Inquiringone -Blue N Blac- an a little chrome

    Joined:
    Dec 9, 2017
    Member:
    #11421
    Messages:
    1,695
    Gender:
    Male
    First Name:
    Ter
    NorCal
    Vehicle:
    U can take the guy out of the garage, But U can’t take the garage out of the guy
  22. Jun 25, 2020 at 6:36 AM
    #22
    Darkness

    Darkness Allergic to white

    Joined:
    Jul 23, 2018
    Member:
    #17315
    Messages:
    4,316
    Gender:
    Male
    First Name:
    Luis
    All over SoCal
    Vehicle:
    The darkest
    It's really dark
    Moe Throwing Out Barney 23052020081334.jpg
     

Products Discussed in

To Top