Flipped exhaust manifolds with adapter

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  • jaywood
    R3V Elite
    • Jul 2010
    • 4528
    #1

    Flipped exhaust manifolds with adapter

    I was looking at the OBX adapter but then I saw this....

    Kenji 325is (from the tech) made this one:


    Who else has made their own adapter? It can't be too tough. What size piping did you use? I am looking at this flange for the t3: http://www.ebay.com/itm/T3-T04E-Turb...#ht_1355wt_912 The power goals I'm shooting for aren't too high...something around 280-300whp.

    I don't have the stock headers on hand right now so I can't measure, but would this work fit (the part of the adapter that attaches to the stock headers)? http://www.ebay.com/itm/2-0-EXHAUST-...r#ht_500wt_927

    And not too sure about wastegate yet. External for sure. Thinking of a 44mm wastegate.

    Just looking for some more pictures and thoughts as to how I should make it.

    Thanks r3v.
    Tags: None
    • jaywood
      R3V Elite
      • Jul 2010
      • 4528
      #2
      Scratch the stock headers flipped upside down....

      Thinking about just making an adapter like OBX does.

        Comment

        • e30leigh
          E30 Addict
          • Mar 2012
          • 481
          #3
          ill be using the obx style one. but i think ill go to revshift to get mine. they are better quality so ive been told. and good guys to talk to. happy to answer questions.

            Comment

            • e30trooper
              R3V OG
              • Mar 2009
              • 11576
              #4
              i have one like the revshift. Its for sale but shipping will be rape.

                Comment

                • e30leigh
                  E30 Addict
                  • Mar 2012
                  • 481
                  #5
                  medium flat rate box would do it wouldn't it? my manifolds cost about $50us to get sent over. possibly pm me? i could be keen on that adapter trooper.

                    Comment

                    • Zacm829
                      E30 Mastermind
                      • Jan 2008
                      • 1919
                      #6
                      Find a M42 manifold, they have individual exhaust pipes, cut and weld to fit!
                      1987 325i-M60b44 swap

                        Comment

                        • jaywood
                          R3V Elite
                          • Jul 2010
                          • 4528
                          #7
                          Originally posted by Zacm829
                          Find a M42 manifold, they have individual exhaust pipes, cut and weld to fit!
                          Not sure if I follow

                          More details please?!

                            Comment

                            • acolella76
                              R3VLimited
                              • Apr 2010
                              • 2950
                              #8
                              I just measured... just for you. Those triangle pieces will probably fit. The stock triangle is about 3in from the outer edge of one bolt to the opposite edge of the other bolt and 1.75" diameter. So to use those pieces you might need to sort of port the stock manifolds a little bit. Maybe slot the bolt holes if they are too close together?

                              Originally posted by Zacm829
                              Find a M42 manifold, they have individual exhaust pipes, cut and weld to fit!
                              Um... totally different flange, and it's not even a turbo manifold. Why would someone cut a M42 manifold?
                              -Alex

                                Comment

                                • jaywood
                                  R3V Elite
                                  • Jul 2010
                                  • 4528
                                  #9
                                  Slot the bolt holes on the new flanges, right?

                                  Thank you for measuring! Still contemplating it the mani...should I build my own? Or buy one.

                                  What size pipe are these manifolds typically made out of? That flange's hole is 2" so I'm thinking 2". How thick?

                                    Comment

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