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  1. S

    Vacuum Lines and Air Box

    Thanks guys... Much appreciated.
  2. S

    Vacuum Lines and Air Box

    Gentlemen, I have a 91 Explorer, 4.0L, 4WD and have a few questions about the vacuum lines at the rear, top of the air box. One has a yellow stripe on it, and runs down underneath the intake, and the other is routed over/behind the engine, connected to a vacuum port, on the upper intake...
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