Removing Exhaust Manifold - Cylinder Bank 4-6

→ Let hot components cool down.

→ Wear personal protective gear.

Information 

Specifications for wrench sizes (a/f specifications) for screw heads are described as follows:

• Torx screws: (E..) for external Torx, (T..) for internal Torx. 
• Hexagon-head bolts (internal and external hexagon): Wrench size (a/f) 

1. Loosen the turbocharger holder -arrow-  .
   Fig 1: Locating Turbocharger Holder And Cylinder Bank (4-6)

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. 1.1. Loosen external Torx screw (E12, M8 x 16) on the holder through the opening in the tailpipe cover → Holder for turbocharger 4-6 accessible through tailpipe opening  .
      Fig 2: Loosening External Torx Screw On Holder Through Opening In Tailpipe Cover

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
      NOTE: Studs and nuts not loosened correctly

      • Threaded bolts can break off exhaust manifold

      → Replace damaged exhaust manifold.

      → Clean the studs and nuts on the exhaust manifold before loosening them and spray with anti-rust agent.

      → Loosen nuts carefully. Loosen the nuts by carefully turning them in both directions if they are very stiff.

      → Heat the threaded joint if necessary.

2. Loosen and screw off three M8 hexagon nuts (a/f 13) on the exhaust manifold flange for the turbocharger -arrows-  .
   1. 2.1. Replace hexagon nuts. 
      Fig 3: Loosening Exhaust Manifold Flange On Cylinder Bank (4-6)

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Unscrew nine external Torx screws (E12, M8 x 27) -arrows-  on the exhaust manifold.
   1. 3.1. Replace screws. 
      Fig 4: Locating Exhaust Manifold Screws

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Press the turbocharger out slightly and pull the exhaust manifold off the studs on the turbocharger.
   1. 4.1. Replace metal seals.