How do you seal your exhaust manifolds/headers ?

Mopar Exhaust Systems

  1. Glenwood

    Glenwood FBBO Gold Member FBBO Gold Member

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    I used the felpro kit gaskets with the manifolds without leaks on iron heads. The new Dougs headers came with gaskets that sealed fine on the new alum heads (so far so good!)
     
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    • beanhead

      beanhead Well-Known Member

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      Aluminum heads/TTI headers... Remflex there and also at the collectors. Can't stress enough how great they work. Also can't stress enough how fragile they are and they can crack if you drop them or fondle them too roughly..then they blow out as soon as you start your engine.
       
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      • Fran Blacker

        Fran Blacker FBBO Gold Member FBBO Gold Member

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        Used dead soft aluminum, collector leaked.
         
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        • polywideblock

          polywideblock FBBO Gold Member FBBO Gold Member

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          remflex on all of mine :thumbsup:
           
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          • YY1

            YY1 Well-Known Member

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            I'm fairly certain the factory didn't use gaskets.
            I didn't put anything on my 318/manifolds when I put it back together and it's fine.

            For old school headers I used to cut the flange between each end pipe and the center set.
            This allows a MUCH better seal on any gasket you use.
             
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            • moparsquid

              moparsquid FBBO Gold Member FBBO Gold Member

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              if header gaskets are paper soak in water and re-tork after it warms up
               
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              • Joske2

                Joske2 FBBO Gold Member FBBO Gold Member

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                Standard Fell Pro with manifolds, no leaks, with headers, only Remflex.
                They are the best but fragile.
                 
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                • 6pktgo

                  6pktgo FBBO Gold Member FBBO Gold Member

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                  Factory HP manifolds, no gaskets ,just a thin layer of "The Right Stuff" 9 years ago & no leaks.
                   
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                  • QuickBpBp

                    QuickBpBp FBBO Gold Member FBBO Gold Member

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