A8L V8-4.2L (BFM) (2004)
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Remove the heat shield bolt - 2 -.
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Free up the O2S behind TWC electrical wire.
‹› The flex joint in the front exhaust pipe must not be bent more than 10 degrees, otherwise it may be damaged.
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Remove the nut - 2 - from the bracket and remove the catalytic converter with front muffler.
Installing
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Installation is performed in reverse order.
‹› Replace the self locking nuts.
‹› Replace the gaskets.
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Install the exhaust system free of stress. Refer to => [ Exhaust System Installing ] See: Service and Repair/Removal and Replacement/Exhaust
System Installing.
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Install the air filter.
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Fill the cooling system. Refer to => [ Draining and Filling ] See: Cooling System/Service and Repair/Procedures/Draining and Filling.
Tightening Specifications
Tightening specifications, Refer to => [ Exhaust System Assembly Overview ] See: Service and Repair/Removal and Replacement/Exhaust System
Assembly Overview.
Front Muffler