Porsche 911 GT3 R Technical Manual page 115

In addition, it should also be noted that with the maximum positive rotation
in the anti-clockwise direction (+7) there must be a 2 mm gap between
the adjuster cable lock-nut and the front brake master cylinder pushrod
clevis to prevent the clevis colliding with the lock-nut.
2 mm
Under all circumstances avoid the system being fitted with
preload. The pushrods of the two master cylinders must be
aligned with the blue aluminium rod of the retaining frame.
The pushrod of the two master cylinders must be screwed into the clevis
so that the thread is visible.
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