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is it bad to cut off the rear two cats

Discussion in '2nd Gen. Tacomas (2005-2015)' started by BAMFTACO, Mar 22, 2010.

  1. Mar 22, 2010 at 8:03 AM
    #1
    BAMFTACO

    BAMFTACO [OP] Pabst Blue Ribbon on ice

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    Would it make a difference in performance
     
  2. Mar 22, 2010 at 8:07 AM
    #2
    Lentsnh

    Lentsnh Well-Known Member

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    What I would think it would Lower your emissions, make it a tad louder, and not as bad of a sulfur smell.
     
  3. Mar 22, 2010 at 8:08 AM
    #3
    PreRunner

    PreRunner Well-Known Member

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    maybe you can put smokestacks up that come through the bed.
     
  4. Mar 22, 2010 at 8:15 AM
    #4
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    If anything the performance would suffer a bit. Also, not advisable as your location says Cali. You would never pass emissions.
     
  5. Mar 22, 2010 at 8:15 AM
    #5
    Dan893

    Dan893 Well-Known Member

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    If your exhaust smells like rotten eggs "sulfur" it's from a bad cat an by taking them out you would raise your emissions because your not burning off the excess garbage. You probobly won't notice any difference in performance unless you take both sets out an sim out the o2 sensors then you will have a raw smelling exhaust and more noise my friend has no cats, short tube headers 3" exhaust and a summit chambered muffler and it's loud as hell
     
  6. Mar 22, 2010 at 8:19 AM
    #6
    Brunes

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    Pretty sure it would make it louder...but it would make the emissions worse. The rotten egg smell would either go unchanged or get stronger (because the sulfer smell comes from the gas...not the cat) and the chemicals released thru the tailpipe would be un-catalyzed.

    Concur with the emissions testing comment above too...
     
  7. Mar 22, 2010 at 8:19 AM
    #7
    Lentsnh

    Lentsnh Well-Known Member

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    I meant raise your emissions. I dont know what I was doing when I typed that. :eek: And my exhaust only smells when I punch it.

    Anyway once you have nothing to calm down the exhaust from the engine, It can get VERY loud. And it takes quite alot of work to make it sound good.
     
  8. Mar 22, 2010 at 8:21 AM
    #8
    TacoSupreem

    TacoSupreem Dirty Trucker

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    The rear cats or resonators flow very well from what I've read. If you was to add a whole new y-pipe then you might see some gains, but just cutting out and welding a piece of pipe in it's place would probably just make more noise.
     
  9. Mar 22, 2010 at 8:28 AM
    #9
    Dan893

    Dan893 Well-Known Member

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    Idk only time I've noticed a sulfur smell from a car it was when we where getting my friends rb25 powered 240sx going an it had a bad cat it wreaked of rotten eggs I guess if I stuck my face near my exaust I would notice what you guys are talking about but completly uncatted exhaust you can smell just standig near the vehicle. Since your in Cali I wouldn't bother as your going to fail emissions and it's a $5k fine if you get caught without them per cat my friend go pulled over In his 89 fox body and they checked for
    cats and told him if he wanted he could wright him a
    $20k fine bacause his car is suppose to have 4 cats
     
  10. Mar 22, 2010 at 9:20 AM
    #10
    LVTacoma

    LVTacoma Well-Known Member

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    Not worth it, the gain is minimal and the headache isnt worth it. Had my cats deleted and It sounds like a weedwacker. I know there isnt too many options to make our trucks not sound like a typical v6 with any aftermarket exhaust but Im almost sure you will regret it then have to do as I did and spend 60 to get them deleted then spend 200 to replace it with a stock one from the boards that youre going to go nuts over trying to find. just my .02. if its sound youre looking for .. hack that muffler off. Thats what I did, its an acquired sound (sounds just like a muffler deleted ranger) but it costs nothing to mod obviously and cost ya 10 bucks to re weld a muffler back on if you dont like it.

    not mine but you get the gist:
    http://www.youtube.com/watch?v=VbgOcYiPtbM
    http://www.youtube.com/watch#!v=9gSo7IPd644&feature=related
     
  11. Mar 22, 2010 at 9:38 AM
    #11
    Manwithoutaplan

    Manwithoutaplan the full Monty

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    I would not do it since you are in Cali.
     
  12. Mar 22, 2010 at 10:39 AM
    #12
    05 X-Runner

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    There are smog exempt areas up here in Nor-Cal, but bein your from So-Cal i wouldnt advise it. Couse if you get cought your screwed
     
  13. Mar 22, 2010 at 10:43 AM
    #13
    Brunes

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    Yup- That's called authority. They have it to enforce laws.....Laws that should be followed if you don't want them to legally confiscate your truck.
     
  14. Mar 22, 2010 at 10:50 AM
    #14
    PreRunner

    PreRunner Well-Known Member

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    :rolleyes:
     
  15. Mar 22, 2010 at 11:10 AM
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    BAMFTACO

    BAMFTACO [OP] Pabst Blue Ribbon on ice

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    Thanks for the help everyone
     
  16. Mar 22, 2010 at 11:13 AM
    #16
    Brunes

    Brunes abides.

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    :rolleyes: back at ya...
     
  17. Mar 22, 2010 at 12:58 PM
    #17
    romafern

    romafern Well-Known Member

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    stock and very pissed about the issues
    Machine gun mount. Would love to blow the shit out of it since it has nothing but issues. QA at Toyota USA is shit. Start making them in Japan for Christ's Sake!
    Do not do it unless you need the money from all the platinum inside.
     
  18. Mar 22, 2010 at 1:03 PM
    #18
    toyotadude5

    toyotadude5 Breazeale- Pronounced Brazil

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    i love mine. It is extremely loud.

    I have both rear cats removed, no muffler, and a 3 inch pipe dumped in frot of the passenger rear tire.
     
  19. Mar 22, 2010 at 1:05 PM
    #19
    woodygg

    woodygg Well-Known Member

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    good, they should make you walk home if you do that.
     
  20. Mar 22, 2010 at 1:11 PM
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    Dan893

    Dan893 Well-Known Member

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    Yea but just because they take your truck doesn't do any good there are tons of states that don't do emissions testing or care if your truck is a smog machine Cali may have strict laws but what about the others, polution doesn't end at the border
     
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