1 cylinder for front brakes, 1 cylinder for rear brakes.
Diffrent sizes to compensate and help out the brake bias (rear brakes need less pressure)
Ignore the 'bolt' through the bias adjuster this was a work in progress shot about 5 years ago

But it shows you the frame work we made for mine.
How it looks with the bottles
We made one the other week for a RWD Mk4 - I guess that could be converted over to FWD applications - if enough interest

Everytime we ask we only ever get about 2 - 3 people interested.
We make all sorts
The direct fit Subaru one...
The Sierra one...