Removing Exhaust Manifold With Catalytic Converter

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Overview of exhaust manifold components with catalytic converter

Exhaust manifold with catalytic converter
Metal seal, always replace
Oxygen sensor downstream of catalytic converter
Oxygen sensor upstream of catalytic converter

Fig 1: Overview Of Exhaust Manifold With Catalytic Converter
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Loosen clamp for silencer.
1. 1.1. Unscrew M8 cheese head bolt and open the clamp.
2. 1.2. Replace sealing ring.
  
  Fig 2: Identifying Exhaust Manifold To Silencer Clamp
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Unscrew nine hexagon-head bolts (M8 x 28) -2- and remove exhaust manifold -1- and seal.

Fig 3: Identifying Exhaust Manifold And Hexagon-Head Bolts
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Check bolt thread for damage and corrosion and replace if necessary.