Thread: brake plumbing questions for my T bucket

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we are probably talking about 2 dif. things. most factory GM cars put all this together and call it a combination valve. that would include the brake warning light, proportioning valve and the residual valves, but after i go back and read it i guess you don't have the warning light sw. (cut the pressure off if a cylinder fails )and thats the biggest reason to have a duel MC, so if one wheel blows out, the combination valve will cut the pressure off to that wheel, and you can keep on driving. i put a drawing in with this that show the cutoff valve. you don't have to have it, but without it you don't need the duel MC. see if the drawing helps any.