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Re: Brake Question
The residual valve is "built in" to the stock stuff. It is only necessary to "add" one in a "custom" application with a bunch of aftermarket "race" parts.
The point of the residual valve is to keep some pressure in the lines because of the springs that pull them back to the "resting" position.
Calipers don't have springs, they just "relax" when you let off of the pedal. Too much line pressure would cause them to drag against the rotors
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