I'm running a 23mm from a Jetta or Passt but I did the rear disc swap.
So... my brake pedal now drops to the floor - yay master cylinder crapped the bed. Brakes have been bled yadda yadda.
My question is, can you use a 20mm bore master cylinder from a golf on the cabby? e.g. will it fit properly?
I doubt it... but it never hurts to ask before I make a dumb mistake.