Exhaust Question - '91 Civic Si

Discussion in 'Civic' started by Chopface, Aug 21, 2004.

  1. Chopface

    Chopface Guest

    Hello,

    I have a 1991 Honda Civic Si and I need to replace the pipe between the
    catalytic converter and the muffler. I bought a 1-piece Bosal pipe, #
    286-531. I was comparing the old 2-piece pipe (manufactured by Merit) to
    the new one, and I noticed that the triangular flange on the new pipe
    where it meets the catalytic converter is orientated so that 1 bolt hole
    is above the pipe and two are below. The flange on the old pipe was
    orientated 180 degrees opposite, 2 bolt holes above the pipe and 1 below.

    Does anyone know the OEM configuration of the flange? Would it hurt
    things to flip the catalytic converter 180 degrees so that the flanges
    will meet up for the new pipe? I bought the car used in 2003 with 120k
    and am assuming the pipe from the exhaust manifold and the catalytic
    converter are still original.

    Thanks for any suggestions,

    Mark
     
    Chopface, Aug 21, 2004
    #1
  2. Chopface

    Mista Bone Guest

    1 top, 2 bottom,
     
    Mista Bone, Aug 21, 2004
    #2
  3. Chopface

    SoCalMike Guest

    if it has a heat shield on the top, id keep it like that.
     
    SoCalMike, Aug 21, 2004
    #3
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