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mandrel bend exhuast pipe

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  • mandrel bend exhuast pipe

    does anyone know where i could possibly find 4 in mandrel bent exhaust pipe... all i can find around here is 3 in and the guys that do it say 4in mandrel benders pretty much dont exist, but ive seen 5in. "subway tunnel" diesel systems in jegs

    any info will be a help

    and im located in central new york

  • #2
    I did a 4" exhaust system and we just got mandrel U bends from a local supplier and cut and welded. You should be able to find them at possibly some diesel shops.

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    • #4
      thanx blown s10 those websites are alot of help...

      and another question do you know where i could get a 2 1/4" to 4" flange to go from my y pipe?

      thanks again and any other information will be a great help

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      • #5
        Reducer

        Originally posted by farmboy weldor
        thanx blown s10 those websites are alot of help...

        and another question do you know where i could get a 2 1/4" to 4" flange to go from my y pipe?

        thanks again and any other information will be a great help
        I dont know if they sell one, but concentric reducers, are sold in heaveir pipe, unless you want to make one ,,,basicaly a cone out of sheet metal,,not hard, especially if you have a small hand brake,Jack

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        • #6
          Originally posted by farmboy weldor
          thanx blown s10 those websites are alot of help...

          and another question do you know where i could get a 2 1/4" to 4" flange to go from my y pipe?

          thanks again and any other information will be a great help
          no problem

          are you looking for a reducer ? sounds like it. and i don't think they make em in those sizes.

          what exactly are you trying to do ? pic/s = 1000 words.

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          • #7
            Burns Stainless has most mandrel bends that you would need. They aren't real cheap, but the quality is top notch! They also have some flanges and other things.
            Syncrowave 250DX w/Bernard cooler
            Handler 140

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            • #8
              thanks but problem solved

              what im really trying to do is build a custom exhust for my diesel out of 4in pipe but i checked with my engine guy and he said that 4in pipe on a non blower engine would result in power loss. he said 3in pipe would result in the largest gains and i know a muffler company who builds that stuff.

              and they also build smooth y pipes... thats why i needed an adapter to go from my 2 1/4" y pipe to a 3" exhuast. now that they are doing it, it will be 3in all the way back from the headers.

              im sorry i dont have pictures though.

              i kind of regret having someone else do it for me. i was really looking foward to building something for the spring.

              but thanks for all of the help guys!

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              • #9
                what kind of diesel? turbo or non turbo charged? displacement? street vehicle or other?
                Lincoln SP170T
                ESAB 875 Plasma
                Smith oxy set
                Dynasty 200DX
                pulsed mig is next...

                Long Island Cummins Ram Owners Club

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                • #10
                  my diesel is a 91 international IDI non turbo in a ford pickup truck

                  its a 444 ci
                  and yes its a street vehicle in fact my brother just bought a 93 version just like mine

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                  • #11
                    they make 2 1/2" to 3". maybe you could modify that. or you could cut the 2 1/4" off the y-pipe, and weld either a 2 1/2" to it, or even a 3".

                    the y-pipe on my truck was 2 1/2" exit. i went to a 3 1/2" exhaust. i welded a reducer cone on the 3 1/2. down to 3". then i cut off the 2 1/2 and welded a 3" piece on the y-pipe.

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