Front Muffler, Removing And Installing, Catalytic Converter Without Particulate Filter: Removing

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Remove the nuts -1- from the front muffler accessible from the top.

Fig 1: Threaded Connection - Front Muffler, Vehicle without Particulate Filter

Courtesy of AUDI OF AMERICA, LLC

Audi Q5: 

-- Remove the tunnel underbody trim panel. Refer to OVERVIEW - UNDERBODY TRIM PANELS .

Continuation for All Vehicles: 

-- Remove the rear noise insulation. Refer to OVERVIEW - NOISE INSULATION .

-- Remove the nut -2- and bolt -3- for the front muffler.

-- Remove the front muffler bolts -arrows-.

Fig 2: Identifying Bolts

Courtesy of AUDI OF AMERICA, LLC

Fig 3: Identifying Bolts

Courtesy of AUDI OF AMERICA, LLC

-- Loosen the clamping sleeve -arrows- and push toward the rear.

-- Remove the front muffler.