[Quentin Z]

BTW, the link from Spdbrake looks like the original one that I replaced. I believe it is a single bore. The replacement I received from BDR was dual bore, note the first pic, larger diameter in the back than the front. The B/A is also dual bore...

Also note, that the brake lines do enter the new style Master cyl at a slight angle compared to the older style, so there will be some minor bending needed if you have an older car.