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Exhaust Manifold swap

Discussion in 'Engine & Performance' started by GaedtkeC, Jul 12, 2019.

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  1. GaedtkeC

    GaedtkeC Junior Member

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    I read in some of the other Dodge forums that you can swap the 5.7 exhaust manifolds with 6.4 exhaust manifolds. Sounded like this helped with the warping issue and broken studs and they supposedly flow better than the OEM 5.7 manifolds? Do any of you have experience with this? Would this be a worthwhile swap? Looking forward to your responses. Thanks I really appreciate it.
     
  2. Brandon-w

    Brandon-w Senior Member

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    Why waste time with stock? Go aftermarket and be done with it for good
     
  3. crackerjack1957

    crackerjack1957 Senior Member

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    Pretty sure the flanges are larger.....would have to modify stock exhaust.
     
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  4. Wild one

    Wild one Senior Member

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    I think they're swapping the 6.4 SRT Jeep headers onto the 5.7 trucks,i haven't heard of anybody swapping the stock 6.4 manifolds off the 2500's onto the 1500's,not sure if there'd be any gain doing that swap,but I could be wrong
     
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  5. Tim Garceau

    Tim Garceau Senior Member

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  6. Tach_tech

    Tach_tech Senior Member

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    The 6.4 truck manifolds have an EGR port that would have to be plugged off.

    I’ve heard of people doing the SRT 6.4 manifolds but not the truck ones.
     
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  7. Hemi395

    Hemi395 Senior Member

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    I would just do shorty headers....
     
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  8. jws123

    jws123 Senior Member

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    i took my old warped ones re surfaced with belt sander they will never re warp prob solved forever
     
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  9. GaedtkeC

    GaedtkeC Junior Member

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    I really appreciate everyone's input on this. I did some digging at some of the exhaust shops in Green Bay and found out that if I were to swap out the exhaust manifolds it would have to be the SRT manifold off of the Jeep or Challenger. But,, as stated in the post above the Y-pipe would have to be modified to accommodate the flange locations on the SRT manifolds. So more trouble than its worth. I ordered a set of Dorman manifolds, Fel-Pro Gaskets, and grade 8 ARP manifold bolts. Have a brother in law is a mechanic and is going to clean up and polish the new manifolds with a die grinder.

    Sent from my SM-G950U using Tapatalk
     
  10. Punishher7

    Punishher7 Senior Member

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    How are you sure they will never re-warp? Honest question.


    Sent from my iPhone using Tapatalk
     
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