I think i found out what the problem is about where the air noise is coming from that makes my brakes stiff and harder to press to stop where they no longer giving me the normal/easier response when i press them lightly.It sounds like the air leaking noise is coming from this thing that i circled and I want to just go ahead and replace it, but i don't know what the part number is to buy another 1 to replace it with.This is where I need the super heroes in the forum to help by being a life saver literally cause i have no brakes if I can't find out what the part number is to replace this part.But to be on the safe side if this turns out not to be the only problem,I need to know the part number to every vacuum line connected to this piece to try and fix it to rule it out to see if it's something more major than that.