Re: Disc Brake Upgrade Reference Thread
The drum/drum masters and the disc/drum masters interchange in that they will physically bolt up in place of the other. Most of the drum/drum masters have the deep bore in the back of the piston. There are some that have the shallow bore.
If you bolt a drum/drum master onto a hydroboost unit, you will have to be sure you use the correct intermediate pushrod. I have not attempted this, so I do not know if the pushrod interchanges with the vacuum boosters or not.
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