1997-1999 Audi A8 Flex Pipe Torque Specs

3.7L V8

Applies to 1997, 1998, and 1999 Audi A8

Labor Time:2 hours

Torque Values (7 specifications)

Component	Nm	lb-ft	Notes
Cover Screws	11	8	—
⚠️ Flange Bolts	47	35	Apply anti-seize
Hanger Bolts	20	15	—
Heat Shield Bolts	14	10	—
⚠️ Manifold Nuts	34	25	Apply anti-seize
Mounting Bolts	27	20	—
⚠️ O2 Sensor	47	35	Apply anti-seize to threads

The primary torque specification for flex pipe on a 1997-1999 Audi A8 is 11 Nm (8 lb-ft).

There are 7 torque specifications for flex pipe on the 1997-1999 Audi A8 3.7L V8, covering all related fasteners and components.