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1972 Jeep Cj5 Exhaust

Discussion in 'Intermediate CJ-5/6/7/8' started by Dale Park, Sep 26, 2021.

  1. Sep 26, 2021
    Dale Park

    Dale Park Member

    Utah
    Joined:
    Feb 15, 2021
    Messages:
    112
    When doing my restore of my 1972 Jeep CJ5 304 v8, the original exhaust manifolds had been broken and re-welded in multiple spots so I just threw them away as they were beyond help. So I went with Hedman fender well headers and thrush mufflers. I might have liked this 50 years ago, but this thing is loud enough that people in the neighborhood cannot have a conversation until I am gone. I know, what was I thinking or expect!!

    I am leaning towards purchasing all new exhaust manifolds and taking to a quality muffler shop and get a dual exhaust exit at rear exhaust put on. I don't mind a rumble etc, so I am thinking of the proflow 40 or 42 series muffler. Just wondering what others have done on their V8's and like the way it turned out sound and fit wise.

    I could stay with the headers and utilize the 31/2" collectors to muffler which would save about $325.00 in manifolds but want rear exit instead of in front of rear wheels.
     
  2. Sep 26, 2021
    sterlclan

    sterlclan Member 2022 Sponsor

    exploring the...
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    Feb 21, 2009
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    3,869
    patriot clipster shorty headers. 2 1/2 dual pipes to jones extreme flow mufflers . 2 1/2 dual tailpipes out the rear corners. the jones mufflers are like flowmasters but round. its tight by the transfer case and getting over the rear axle. it rumbles decent. really sings over thirty five hundred rpms
     
  3. Sep 26, 2021
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Aug 10, 2003
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    23,596
    I think iron manifolds are best for a Jeep. They are strong, durable, cool, don't leak and are quiet. They are not the best for performance, but pre-80 AMC factory exhaust manifolds are quite good for iron manifolds.

    JMO - I would go quiet, with whatever my muffler shop recommended. My CJ-6 has a muffler shop exhaust that has been on the Jeep since I've owned it. Looks like the exhaust pipe is made from roll bar tubing - very sturdy.
     
    dane71 likes this.
  4. Sep 27, 2021
    masscj2a

    masscj2a Member 2023 Sponsor

    Ware, Mass
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    Dec 27, 2013
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    743
    I'll be installing a 304 in place of the 258 in my 74 cj6 eventually. I always have a tough time choosing between spending the money on a Waldons exhaust or a custom shop. Last custom shop job on my 46 with a swapped 4.3 was a nightmare. Cracked twice at the Y pipe and not happy with quality . But I don't have the iron stock manifolds.
     
  5. Sep 27, 2021
    masscj2a

    masscj2a Member 2023 Sponsor

    Ware, Mass
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    Dec 27, 2013
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  6. Sep 30, 2021
    johneyboy03

    johneyboy03 The green beast

    Quebec, Canada
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    Jan 15, 2011
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    2,115
    It will depend on what kind of muffler you have put. There is louder muffler than other. I run magnaflow on my 5.3 ls engine with fenderwell headers, i can barely hear the exhauts at idle. When cruising at 2200-2300 rpm i hear more my tire than the exhauts.

    But when i go WOT it make just a nice roar.
     
  7. Sep 30, 2021
    74CJ5 Renegade

    74CJ5 Renegade Member

    Houston, TX
    Joined:
    Dec 1, 2002
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    269
    I love my Patriot shorty ceramic coated headers. I was a bit nervous that they would be loud but they are very very slimilar to how the stock iron manifolds sounded….


    If you want a vid let me know
     
    Last edited: Oct 4, 2021
  8. Oct 3, 2021
    bigjohn

    bigjohn Active Member

    Kelso Wa
    Joined:
    Mar 18, 2010
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    1,054
    When I had my 74 I always planned on doing an exhaust shop system with the y pipe single rear corner exit with maybe a 40 series muffler for “grandpa loud “. The driving force was simple and tucked up away from rocks and such. Use should definitely help decide which direction to go.
     
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