Inline tube - PR100a - 78-86 GM Factory Disc Brake Proportioning Valve Correct Switch. This is the switch only that is in the top of the Prop. Valve of all 78-86GM cars. Your brake warning light lead plugs in and if there is a loss of pressure a warning light in the dash will be on. This is exact to NOS in every way even featuring the correct plating and design. Please view my exclusive Inline Tube e-bay items. These are the details that separate the first place cars from the rest.
