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Where Did You Put Your Muffler With Rear Fuel Tank?

Discussion in 'Early CJ5 and CJ6 Tech' started by 71CJ54WD, Jun 15, 2020.

  1. Jun 15, 2020
    71CJ54WD

    71CJ54WD Sponsor

    DC
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    My 71 with rear mount fuel tank had side pipes that have been removed during my Saginaw swap. I will not be going back to side pipes. There’s a mandrel bending shop I’ll probably use to to merge my two manifolds into one and out the back. I’d like to keep clearance high. So what diameter pipe did you use for your V6 and where did you put your muffler? I’d like it to be quiet so no bullet mufflers and ideally everything can stay between frame rails. The factory routing I’ve seen but curious if anyone has done it differently.
     
  2. Jun 15, 2020
    willie2323

    willie2323 New Member

    Phoenix, Arizona
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    Dec 10, 2009
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    howdy,
    yea I did it differently on my 71 but I use wheel well headers on my replacement Buick 231. So the natural placement for the mufflers is outside the frame rails between the front and rear tires which I use then I routed the exhaust up thru the rear wheel wells and out the back. Works very well as its quiet, low restrictive and looks good with the dual exhaust tips out the rear. I can send pics if you are interested.

    cheers,
    willie
     
  3. Jun 15, 2020
    Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Virginia Beach, VA
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    FSM - late exhaust
    exhaust-late.JPG
    any muffler shop can remake the crossover pipe with a driver side rear exit manifold
     
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  4. Jun 15, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Liberty Lake, WA
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    How're your fabrication skills? I made my own to fit my small space and it was surprisingly easy.

    Varg In Jeep's Clothing
     
  5. Jun 15, 2020
    Ohiowrangler

    Ohiowrangler Member 2023 Sponsor 2022 Sponsor

    Newark, Ohio
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    I just built my exhaust on my cj5, 4.3-t18-d20. When I find my camera, I'll post a pic. Basically I put the cross over behind the transfer case, and out the back. I'll try to get pic tomorrow, Ron
     
  6. Jun 15, 2020
    colojeepguy

    colojeepguy Colorado Springs

    At the foot of...
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    With a rear tank, you need to put the muffler between the tcase and the rear axle.
     
  7. Jun 15, 2020
    cayenne

    cayenne Member

    central Texas
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    This is where I have mine.
     
  8. Jun 16, 2020
    71CJ54WD

    71CJ54WD Sponsor

    DC
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    Thanks all. I think the factory position is likely my only option. I was going to get a fancy muffler like a Magnaflow or something but I think I'll just let them put in something they stock.
     
  9. Jun 16, 2020
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    The rear exit like that is the best - but not perfect - for keeping exhaust fumes out of the cabin. With a single exhaust, it will always exit on the side opposite from the fuel filler.
     
  10. Jun 16, 2020
    Boyink

    Boyink Super Moderator Staff Member

    Tulsa, OK
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    On my CJ5, I had dually glass packs outboard of the frame, between the wheels, routed back along the frame with rear exits.
     
  11. Jun 16, 2020
    jzeber

    jzeber Well-Known Member 2022 Sponsor

    Morgan Hill, Ca
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    I built my own exhaust also. To avoid crushing the cross over I ran it around the front of the oil pan and out the back. The muffler is located between the t-case and rear diff. Here is a pic of most of it prior to install. I'll look for a pic of the muffler installed.
     

    Attached Files:

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  12. Jun 17, 2020
    71CJ54WD

    71CJ54WD Sponsor

    DC
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    That is a good idea. Would appreciate a picture of the muffler setup.
     
  13. Jun 19, 2020
    jzeber

    jzeber Well-Known Member 2022 Sponsor

    Morgan Hill, Ca
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    Here are a few more pictures. I don't seem to have one of the muffler. I' ll get one today or tomorrow.
    Pic 1 wrapping around the front of the oil pan. Pic 2 connecting driver side with passenger side. Pic 3 winding through the skid plate and towards the muffler location.
     

    Attached Files:

  14. Jun 19, 2020
    71CJ54WD

    71CJ54WD Sponsor

    DC
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    Looks nice! Hows the clearance between pinion and pipe?
     
  15. Jun 19, 2020
    Richard in AZ

    Richard in AZ I just don't understand the like of patina

    PHX AZ
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    That looks real nice.....you wouldn't by chance have a list of part numbers for those pipes...?
     
  16. Jun 19, 2020
    jzeber

    jzeber Well-Known Member 2022 Sponsor

    Morgan Hill, Ca
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    I have hit it a few times with the front drive shaft, self clearanced. Thankfully not terribly. I'll check but it was a while back. I just ordered a bunch of parts from Summit. I have found that many of my receipts are faded and unreadable
     
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