Left Exhaust Manifold - Tightening Torque And Tightening Sequence

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Tighten nuts in the sequence -1...9- in 3 steps as follows:

Screw on nuts hand-tight .
Tighten to 15 Nm (11 ftlb.) initially.
Tighten to 25 Nm (19 ftlb.) .

Fig 1: Left Exhaust Manifold Nuts Tightening Sequence
Courtesy of PORSCHE CARS NORTH AMERICA, INC.