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