Ferrari California Workshop Manual page 417

Tightening torque
Oxygen sensor - catalytic converter
Catalytic converter clamp - mounting bracket
Catalytic converter - exhaust manifold
Oxygen sensor
Nut
Nut
Nut (pretightening)
Replace the metal gasket (5).
The metal gasket (5) must be replaced each
time it is removed.
Fit the new metal gasket (5).
Tighten the rear oxygen sensor (4) onto the
catalytic converter.
Tightening torque
Oxygen sensor
Nm Class
50 Nm B
25 Nm B
25 Nm B
15 Nm 0
Nm Class
50 Nm B