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Lines

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Make your life easier and grab the lines to the proportioning valve out of whatever you yank the other parts from. The WJ uses a metric bubble style fitting (left), while the '89 MJ uses a standard double flare (right). We simply cut the two lines, put the '89 nuts on the late-model lines, and reflared it so the lines would bolt into the stock proportioning valve just like they were supposed to be there.

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