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X3 Vacuum Booster Adapter Fittings

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    X3 Vacuum Booster Adapter Fittings

    I'm in the process of installing an X3 Vacuum Brake Booster into my M50 swapped 1988 Coupe. Does anyone know what adapter fittings I need for the brake lines? I bought M10 to M12 adapters, but they only fit into the X30 Master Cylinder. The lines won't fit into the M10 side.

    #2
    Sub'd. I am going that same route but have not got there yet. My suggestion is head to o'Reilys, that have some adapters there.

    Comment


      #3
      As you can see the M12 side is a taper fit and M10 side is also tapered for the e30 bubble flare brake line. This is very important because threads don't seal the system from leaks, the taper ends do.
      Last edited by KIRIEIW; 05-15-2020, 08:27 PM.


      1992 M tech 2 Convertible - S50 Swap
      1992 e34 Touring- S50 Swap
      1992 325i-S50 Swap

      1995 e36 M3 Mugello Red - S50
      1991 325i Convertible Laguna Green (SOLD)
      1987 325i (SOLD);1992 M tech 2 Convertible (SOLD)
      1988 325i Convertible Alpine White (SOLD)
      1991
      Brilliantrot Convertible 80k Miles (SOLD)
      1992 325i Convertible Schwarz (SOLD)
      1992 318i Convertible Project-Finished (SOLD)

      Comment


        #4
        Originally posted by KIRIEIW View Post
        As you can see the M12 side is a taper fit and M10 side is also tapered for the e30 bubble flare brake line. This is very important because threads don't seal the system from leaks, the taper ends do.
        Originally posted by twright View Post
        I'm in the process of installing an X3 Vacuum Brake Booster into my M50 swapped 1988 Coupe. Does anyone know what adapter fittings I need for the brake lines? I bought M10 to M12 adapters, but they only fit into the X30 Master Cylinder. The lines won't fit into the M10 side.
        Guys is this a better performing brake booster then the 944 unit in my 1987 e30/s52? I get that it is from a newer car model, but does it perform better as in slow/stop the car quicker or does it have better brake pedal feel? I would like better brakes without shelling out for a bbk or doing the 5 lug thing so frankly anything thing would help at this point. Yes I know this is not a bbk bandaid but am curioius as to the advantages if any over what I have installed. I currently run brembo solid rotors, Hawk-hp10 pads and some r3v/homemade brake duct venting with motul brake fluid flushed through every 6 mos.
        Thank you in advance for your reply.

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        Comment


          #5
          Originally posted by bradmer View Post



          Guys is this a better performing brake booster then the 944 unit in my 1987 e30/s52? I get that it is from a newer car model, but does it perform better as in slow/stop the car quicker or does it have better brake pedal feel? I would like better brakes without shelling out for a bbk or doing the 5 lug thing so frankly anything thing would help at this point. Yes I know this is not a bbk bandaid but am curioius as to the advantages if any over what I have installed. I currently run brembo solid rotors, Hawk-hp10 pads and some r3v/homemade brake duct venting with motul brake fluid flushed through every 6 mos.
          Thank you in advance for your reply.

          I have the 944 booster in my 92' convertible and the X3 booster in my 89' 325i. The X3 booster has a much better pedal feel and I'd say it's worth the upgrade. Little more work to install the X3 booster but once you modify the clevis it's a direct bolt in booster swap, with a much better pedal feel then the 944. You won't need a BBK after the X3 booster (or e90 brake booster for that matter).


          1992 M tech 2 Convertible - S50 Swap
          1992 e34 Touring- S50 Swap
          1992 325i-S50 Swap

          1995 e36 M3 Mugello Red - S50
          1991 325i Convertible Laguna Green (SOLD)
          1987 325i (SOLD);1992 M tech 2 Convertible (SOLD)
          1988 325i Convertible Alpine White (SOLD)
          1991
          Brilliantrot Convertible 80k Miles (SOLD)
          1992 325i Convertible Schwarz (SOLD)
          1992 318i Convertible Project-Finished (SOLD)

          Comment


            #6
            Originally posted by KIRIEIW View Post
            As you can see the M12 side is a taper fit and M10 side is also tapered for the e30 bubble flare brake line. This is very important because threads don't seal the system from leaks, the taper ends do.
            Thanks, that's just what I needed. Most of the adapter fittings available don't have that bubble flair end on BOTH sides.

            Comment


              #7
              Here is the p/n I used from summit racing:

              EDD-267000

              The picture is not the actual product, they sent me the correct brass fittings.

              Comment


                #8
                Originally posted by KIRIEIW View Post


                I have the 944 booster in my 92' convertible and the X3 booster in my 89' 325i. The X3 booster has a much better pedal feel and I'd say it's worth the upgrade. Little more work to install the X3 booster but once you modify the clevis it's a direct bolt in booster swap, with a much better pedal feel then the 944. You won't need a BBK after the X3 booster (or e90 brake booster for that matter).
                KIRIEW I appreciate the information.

                Comment


                  #9
                  And this is why the forum is better than the FB group. Thanks guys.

                  Comment

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