P-valve, proportioning valve, pressure valve, call it what you will. Removing it with a tee will effectively disable the rear brakes. Yes, it is independent of the rear brakes. But what it does is Lower the front brake pressure thus causing increased REAR brake pressure at the same peddle pressure. This has been discussed 100’s of times and as a brake specialist, we have also tested all these configurations. The only time a tee should be used is if the rear brakes have been upgraded.
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