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New exhaust system project

Discussion in '1st Gen. Tacomas (1995-2004)' started by CSC, Sep 18, 2018.

  1. Sep 18, 2018 at 10:49 PM
    #1
    CSC

    CSC [OP] Active Member

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    Craig
    Grand Canyon, AZ
    Vehicle:
    1999 Tacoma TRD
    With 327,000 miles on the original exhaust system, a split muffler and a cat code it seems time to change out the whole system. I’ve had good luck with Walker exhaust systems before so I’m giving to a go on my TRD. Cat part number 15826, gaskets (2) 31585, exhaust pipe 55096, muffler and tail pipe 18825, hangers (4) 35725, hanger (1) 35111, upstream O2 sensor Denso 234-4161, downstream O2 sensor Denso 234-4154 and a 2 1/4” clamp 35346. I hope to get started Thursday after work. I’ll report back on how the install goes. 668529D6-5A9D-4D64-B722-B3138CEC92E4.jpg
     
    Rocan and Silver04 like this.
  2. Oct 30, 2018 at 9:57 AM
    #2
    Arctic Taco

    Arctic Taco Well-Known Member

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    Steve
    Denali Park, Alaska
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    98 Tacoma Xtra Cab SR5
    dents and missing bits
    Do you have part numbers on the rubber hangers by chance? I just semi finished installing a Borla on my rig with a Walker? adjustable flange cat having a little drama with alignment from my TRD header.
     
  3. Oct 30, 2018 at 11:27 AM
    #3
    CSC

    CSC [OP] Active Member

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    1999 Tacoma TRD
  4. Oct 30, 2018 at 2:11 PM
    #4
    CSC

    CSC [OP] Active Member

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    Craig
    Grand Canyon, AZ
    Vehicle:
    1999 Tacoma TRD
    Finally getting around to the install report. I ordered everything from Amazon Prime and only paid for shipping for one item and that was the last item to show up at my house. Total cost $425.91 to my door. The install went smooth, 2 hours. Only hitch and time suck was my inability to remember the orientation of the cat support bracket. Installed it about four times until I figured it out.
    IMG_3066.jpg
    Cat install including the support bracket.
    IMG_3067.jpg
    Muffler and exhaust pipe install. New leaf springs arrive tomorrow :)
    IMG_3069.jpg
    Muffler and tail pipe install.
    IMG_0955.jpg
    Tail pipe to original hanger
    IMG_3068.jpg
    Downstream Denso O2 sensor installed into the new exhaust pipe.
    IMG_0957.jpgUpstream O2 sensor

    I used new SS bolts, washers and nuts at the flanges

    The sound is exactly the same as stock. All in all a good experience and happy ending.
     
    Last edited: Oct 30, 2018
  5. Oct 30, 2018 at 2:36 PM
    #5
    yotatoy02

    yotatoy02 Well-Known Member

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    OME 3" Suspension lift, tailgate removal, 2016 wheels
    This is a little off topic but how does the borla sound? I’m assuming you got a v6.

    I’m considering putting a borla exhaust on with obx headers.
     
  6. Oct 30, 2018 at 3:10 PM
    #6
    Arctic Taco

    Arctic Taco Well-Known Member

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    Denali Park, Alaska
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    98 Tacoma Xtra Cab SR5
    dents and missing bits
    Sounds good, not too much like a Honda with a resonator- throatier I think

    OP thanks for the part numbers. Do you have any idea what the cat support is-OEM or aftermarket
    Are those OEM flange gaskets?
    Is that an OEM hanger on the final one by the tip? Might be the difference between model years as well I guess

    I have a reducing clamp I think I will be using between my Walker cat and the Borla, there is a slight size diff, I cut the flange off of the POS DNA motors cheapo as header that didn’t fit right, and will try that as a transition back to the Borla, most of the 2 hole flange gaskets I have left over are just the aluminized material not actually having the metal center ring.

    The old system was all bastardized and welded so a few of the OEM hangers are mia...
     
  7. Oct 30, 2018 at 3:52 PM
    #7
    CSC

    CSC [OP] Active Member

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    Craig
    Grand Canyon, AZ
    Vehicle:
    1999 Tacoma TRD
    The rusty cat support is original to the truck. Walker makes one too,

    http://www.walkerexhaust.com/catalog/walker-exhaust-systems/e-catalog-lookup/36237

    Full system link,

    http://www.walkerexhaust.com/catalog/walker-exhaust-systems/e-catalog-lookup

    The cat and flange gaskets are from walker. all part numbers are in the original email at the top of this thread.

    The tail pipe hanger is also OEM. OME makes and extension hanger that might work for you.


    https://wheelersoffroad.com/i-25490...95-2004-tacoma-fk21.html?ref=category:1387374

    Not entirely sure but it looks like the OME hanger would bolt to the stock location/holes on the frame near the shackle. Here is a photo of the stock hanger,
    IMG_0955.jpg
     
    Last edited: Oct 30, 2018
  8. Oct 30, 2018 at 4:54 PM
    #8
    Arctic Taco

    Arctic Taco Well-Known Member

    Joined:
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    Gender:
    Male
    First Name:
    Steve
    Denali Park, Alaska
    Vehicle:
    98 Tacoma Xtra Cab SR5
    dents and missing bits
    Great, thanks for the info the rear hanger is definitely different must be a model year improvement. Mine just has 2 bolts holding a rubber mount for the hook on the tailpipe. Looks like it bolts up in the same place though.
    Does your TRD have a header as well? I noticed the cat had an adjustable flange. I installed a TRD header and had to use the adjustable flange as the header outlet bolt holes were not parallel to the ground more like 10 and 4 o’clock.
    Great write up thanks for all the info.
     
    Last edited: Oct 30, 2018

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