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Cat-back

Discussion in 'Performance and Tuning' started by Dustydirt19, Sep 15, 2016.

  1. Sep 15, 2016 at 3:56 PM
    #1
    Dustydirt19

    Dustydirt19 [OP] Hoghead

    Joined:
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    Dustin
    Duluth, MN
    Vehicle:
    2015 Blue Ribbon Metallic 5.7L SR5 TRD DC
    Gibson Metal Mulisha cat-back exhaust, S&B cold air intake, N-Fab Hooped Nerf Bars, big stick antenna, sales organizer and tray, weathertech laser cut floor mats, weathertech window deflectors To come...... Toytec boss 3" lift with uca's and shackles Bushwacker fender flares Iron cross pre-runner front bumper and rear bumper Long way to go!!
    I'm installing a gibson metal mulisha cat back exhaust on my ride. Because the cat isn't getting messed with, the check engine light shouldn't come on after the install correct?
     
  2. Sep 15, 2016 at 4:08 PM
    #2
    Relentless

    Relentless Tundra newb Vendor

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    East of the Sierras(Reno), Nevada
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    Just a few, more to come
    Should be no reason to see a CEL after the exhaust install. Just disconnect the ground of the battery when you start and re connect when done to let the ECU re-adjust.
     
  3. Sep 15, 2016 at 4:14 PM
    #3
    Dustydirt19

    Dustydirt19 [OP] Hoghead

    Joined:
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    Dustin
    Duluth, MN
    Vehicle:
    2015 Blue Ribbon Metallic 5.7L SR5 TRD DC
    Gibson Metal Mulisha cat-back exhaust, S&B cold air intake, N-Fab Hooped Nerf Bars, big stick antenna, sales organizer and tray, weathertech laser cut floor mats, weathertech window deflectors To come...... Toytec boss 3" lift with uca's and shackles Bushwacker fender flares Iron cross pre-runner front bumper and rear bumper Long way to go!!
    Cool. That's what I thought just wanted to make sure. Thanks
     
  4. Sep 15, 2016 at 6:29 PM
    #4
    Abrams65

    Abrams65 New Member

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    Not understanding the need for this. Its all downstream from the catalytic converter and O2 sensors.
     
  5. Sep 16, 2016 at 7:50 AM
    #5
    Relentless

    Relentless Tundra newb Vendor

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    Eric
    East of the Sierras(Reno), Nevada
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    Just a few, more to come
    Higher flow exhaust = more efficient = more power. But from my understanding it's recommended to let the ECU re learn after any performance mods so it can adjust. Aftermarket intakes are the same way and usually even states to do so in the install instructions.
     
  6. Sep 16, 2016 at 8:18 AM
    #6
    chphilo

    chphilo New Member

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    I don't think you have to disconnect the battery. I never did with my exhaust nor with my intake. I think it's just more efficient to disconnect the battery to speed up the ECU's adjusting process.
     
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