I did the brake conversion on my 84tt,bought the stuff used off these boards as a kit (did this bout 3yrs ago) it all works great but was wondering what this cannister is.It is in the vaccume line between the vaccum block and the booster,bout the size of a fuel filter.The reason why I`m asking is that I`m building a 94 ford ranger w/an eng out of a t-bird turbo coupe.I`m to the point of hooking up the vaccum lines and was wondering if I need that sort of a thing on this turbo ford brake booster? Can some one clue me in here? If I do need this part,where do I find one? thanks,,Jack