Mazda RX-8 Manual page 1423

Tightening torque
11.814.6 N·m {121148 kgf·cm, 105129 in·lbf}
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2. Apply a vacuum of 66.7 kPa {500 mmHg, 19.7 inHg} to the power brake unit using a vacuum gauge.
NOTE:
Use any commercially available vacuum gauge.
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3. Using calipers, measure dimension L as shown in the figure.
Standard L dimension
22.923.2 mm {0.9020.913 in}
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4. If dimension L is not within the standard, remove the SST (49 G043 001) and, while stopping the push
rod rotation with the SST (49 E043 003A), adjust the push rod length with the SST (49 B043 004).
(w) RX8 - Brakes
Page 9