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Another really trick thing from Wilwood is the adjustable proportioning valve and can be used for disc/drum or disc/disc applications. The Proportioning valve works by metering the line pressure in the rear brakes with the adjustable fine treaded screw. This allows the driver to fine tune the front to rear brakes so that the rear brakes will not lock up or skid under braking. Ideally the rear brake line pressure is adjusted so that the front brakes will lock up before the rears. I may install it near the drivers seat or in the more traditional spot under the hood.