S4 V8-4.2L (BHF) (2004)
-
Remove mounting bolts - 1 to 4 - for combination valves of Secondary Air Injection (AIR) system.
-
Unscrew nuts - 1 to 12 - and remove left exhaust manifold.
-
Remove left heat shield - arrows -.
-
Unscrew nuts - 1 to 12 - and remove right exhaust manifold.