The master cylinder of OEM MC39324 has other reference numbers, which are M39324, 174-599, 18008068, 18010748, 18014705. The bore diameter of this cylinder is 1-1/4" which is equal to 31.75mm. There are two ports of the outlets. The thread size of forward port is 1/2-20" and the rearward port is 9/16-18". It is made by cast-iron.
