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LCE Header and cat delete question

Discussion in '4 Cylinder' started by Reh5108, Mar 25, 2017.

  1. Mar 25, 2017 at 10:53 AM
    #1
    Reh5108

    Reh5108 [OP] Well-Known Member

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    I have a 04 3rz and I'm looking at adding the LCE long tube header. This header will delete the 1st cat. I'm wondering if with just the second cat, will I throw a code? I know there are ways to trick the ECU into thinking everything is good. I believe there were years that came with a single cat as well.

    @tooter I know you might have some insight to this.
     
  2. Mar 25, 2017 at 11:40 AM
    #2
    TYetti

    TYetti 4cylinders of awesomeness

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    As long as your o2 sensors are present you shouldn't throw any codes
     
    Reh5108 [OP] likes this.
  3. Apr 18, 2017 at 8:38 PM
    #3
    Reh5108

    Reh5108 [OP] Well-Known Member

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    So I found my answer by doing it. I've now driven over 200 miles with the LCE header and haven't thrown a code.

    The LCE header is roughly 5" shorter and sits roughly an inch higher than the stock one so some adjustments to the rest of the system are necessary. I did use universal hangers to hold the tail end up. But still used the factory mounts on the frame. I am only using 1 of the factory hangers for the cat pipe. I rotated that pipe so the shorter hanger is now using the mount on the cross member and is sitting above it. It's not pretty but it'll do for now.
     
  4. Apr 18, 2017 at 8:51 PM
    #4
    Matic

    Matic The "OFG" Baby!!!

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    Tricky Dick
    Easley, SC
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    1 owner 2002 TRD, SR5, DC, 2.7. Full OME suspension, STT pro's.
    OME 881 coils with OME nitrochargers shocks up front. TC UCA's OME Dakars with extra leaf in the rear. Warn 8000 winch with 80ft custom braided synth line. Custom 60ft synth extension. All pro tube bumper, Hi-lift jack, Safari Snorkel, Wilco tiregate.
    In your 1st post you claim the long tube header Elim ates the 1st cat...but in your last post you claim it's 5 inches shorter.
    So...did you have to eliminate the front cat or the a/f sensor. Or did you keep both cats?

    Some pics and part numbers would be great.
    I've been looking for headers for a while.
     
  5. Apr 18, 2017 at 9:47 PM
    #5
    Reh5108

    Reh5108 [OP] Well-Known Member

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    My motor had a mini header with a cat in the down pipe. The LCE header eliminates that downpipe but is plumbed for the egr and a/f sensor. It just doesn't extend as far as the down pipe did. So I only have the second cat left.

    I'll try and get some pictures tomorrow but my skid plates might make it difficult to get good ones.
     
    Matic likes this.
  6. Apr 18, 2017 at 9:49 PM
    #6
    Reh5108

    Reh5108 [OP] Well-Known Member

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    Any motor guru's reading this thread? Could you explain why cylinder 1 is much darker than the rest?
     
  7. Apr 22, 2017 at 7:50 PM
    #7
    Reh5108

    Reh5108 [OP] Well-Known Member

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    OME lift, 4x sliders, Demello rear bumper, custom front bumper, Engo 9000lb winch
    I can get more pictures if you need but I think this shows everything pretty well.

     
    Ritchie likes this.
  8. May 1, 2017 at 7:02 PM
    #8
    TRVLR500

    TRVLR500 Well-Known Member

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    I have a similar question????? My 2004 with the 3RZ was originally bought in Kalifornia but it will never go back there and now that I live in Wyoming I'm wondering if I can get an LCE when the time comes for a complete exhaust system and just convert my exhaust system to what it would have if originally bought in Wyoming. Wyoming has no emissions testing. Would a different ECU be necessary or would the one that is in there now work?

    The LCE header is the ONE product I have read about that really improves anything with the gutless 3RZ and that is the only "aftermarket" gizmo my truck will ever see. At this point in time anyway. However, I know the exhaust is going to have to be "re-engineered".
     
  9. May 14, 2017 at 8:13 AM
    #9
    sawed off

    sawed off Well-Known Member

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    O2 sensors before cat are used to regulate A/F ratio, 02 after cats are for the ECU to see if cats are functioning correctly. You all that are removing stuff are just asking for problems, and all aftermarket headers suck for normal street driving.
     
  10. May 24, 2017 at 7:32 PM
    #10
    TRVLR500

    TRVLR500 Well-Known Member

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    I agree with your thoughts 100% and always have up until I read how many people bought an LCE header and found it worked as advertised. The LCE, as I said is the only thing I've ever thought about changing on my 2.7. Still thinking about it. It would be nice to have the torque curve lowered down to a lower RPM. That would be extremely helpful for those of us in the mountains.
     
  11. May 24, 2017 at 7:51 PM
    #11
    taco2010trd

    taco2010trd Cyber Bully

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    Cool logo OP
     

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