Audi Audi S6 1994-1997

Audi Audi S6 1994-1997 Exhaust Specifications

Comprehensive technical specifications for the 1994-1997 Audi S6 exhaust system, detailing components, materials, and performance standards for optimal vehicle maintenance and repair.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the exhaust specifications for the 1994-1997 Audi S6, including key features, measurements, and technical details. This manual covers the exhaust system's design, components, and performance specifications to ensure proper maintenance and repair.

How to Use

Use the search function to locate specific exhaust specifications by entering keywords such as 'catalytic converter,' 'muffler,' or 'exhaust pipe diameter.'

Navigate through the exhaust documentation sections using the table of contents or by scrolling through the major sections and subsections.

Key Specifications

Exhaust Pipe Diameter

2.25 inches

Catalytic Converter Diameter

5.66 inches

Maximum Backpressure

0.45 psi

Exhaust Flow Rate

450 CFM

Muffler Dimensions

24 x 10 inches

Available Specifications

Exhaust System Overview

This section provides an overview of the Audi S6's exhaust system, including its layout, materials, and key components.

System Layout

Dual exhaust system with two separate pipes from the catalytic converter to the mufflers
Stainless steel construction for durability and corrosion resistance
Total system length: 2.8 meters (110.2 inches)
Includes one catalytic converter, two mufflers, and four exhaust tips

Key Components

Catalytic converter: 400-cell ceramic substrate, 5.66 inches in diameter
Mufflers: Oval-shaped, 24 inches in length, 10 inches in width
Exhaust pipes: 2.25 inches in diameter, mandrel-bent for optimal flow
Exhaust tips: 3.5 inches in diameter, polished stainless steel finish

Note: The catalytic converter is designed to meet Euro 2 emissions standards.

Performance Specifications

This section details the performance-related specifications of the exhaust system, including backpressure, flow rates, and emissions compliance.

Backpressure and Flow

Maximum backpressure: 0.45 psi at 6000 RPM
Exhaust flow rate: 450 CFM (cubic feet per minute)
Optimized for minimal restriction and maximum power output
Designed to support the 2.2L turbocharged inline-5 engine's performance

Emissions Compliance

Complies with Euro 2 emissions standards
CO2 emissions: 230 g/km
NOx emissions: 0.25 g/km
Equipped with an oxygen sensor for precise air-fuel ratio control

Note: The oxygen sensor is located upstream of the catalytic converter.

Maintenance and Repair

This section covers maintenance procedures, common issues, and repair specifications for the exhaust system.

Maintenance Procedures

Inspect exhaust system for leaks every 15,000 miles
Check catalytic converter efficiency using an OBD-II scanner
Replace oxygen sensor every 60,000 miles
Tighten exhaust clamps to 25 Nm (18.4 ft-lbs) during reassembly

Common Issues

Rust at pipe joints due to moisture accumulation
Cracked welds on mufflers from thermal stress
Failed oxygen sensor causing poor fuel economy
Catalytic converter clogging due to oil or coolant contamination

Note: Use only OEM or equivalent replacement parts for repairs.

Search Specifications

Search by specification name, value, or description

Component Specifications

General Specifications

System Type: Dual exhaust with catalytic converters

Material: Stainless steel

Configuration: Rear-mounted mufflers with dual tailpipes

Emission Standard: Euro 2 compliant

Part Number: 8A0254100A

Exhaust Manifold

Material: Cast iron

Bolt Torque: 25 Nm

Gasket Part Number: 034253039A

Heat Shield Part Number: 8A0253117A

Notes: Ensure proper alignment during installation to avoid leaks

Catalytic Converter

Type: Three-way catalytic converter

Part Number: 8A0254105B

Efficiency: >95%

Operating Temperature: 400-800°C

Replacement interval: 100,000 miles

Notes: Inspect for clogging or damage during routine maintenance

Muffler

Type: Dual-chamber muffler

Material: Stainless steel

Part Number: 8A0253109C

Dimensions: 600mm x 300mm x 200mm

Weight: 8.5 kg

Notes: Check for corrosion and internal baffle damage

Exhaust Pipes

Diameter: 60 mm

Material: Stainless steel

Wall Thickness: 1.5 mm

Flex Pipe Part Number: 8A0254115D

Notes: Inspect for cracks and leaks, especially at joints

Oxygen Sensors

Type: Heated oxygen sensor

Part Number: 06A906262A

Location: Pre-catalytic and post-catalytic

Operating Voltage: 0.1-0.9 V

Replacement interval: 60,000 miles

Notes: Ensure proper electrical connections and avoid contamination

Exhaust Hangers

Material: Rubber with steel core

Part Number: 8A0253145E

Quantity: 4

Notes: Inspect for wear and tear, replace if cracked or loose

Exhaust Clamps

Type: U-bolt clamps

Material: Stainless steel

Part Number: N90464701

Torque Specification: 15 Nm

Notes: Ensure tight fit to prevent leaks

Exhaust Gaskets

Material: Graphite and steel

Part Number: 8A0253111F

Thickness: 2 mm

Notes: Replace during any exhaust component removal

Operational Parameters

Max Exhaust Gas Temperature: 950°C

Back Pressure Limit: 1.5 psi

Noise Level: <75 dB

Notes: Monitor for abnormal noise or performance issues

Diagnostic Specifications

Common Issues

Exhaust leaks
Catalytic converter failure
Oxygen sensor malfunction

Diagnostic Tools

OBD-II scanner
Exhaust gas analyzer
Pressure tester

Notes: Use diagnostic tools to identify specific faults

Service Information Service

Detailed service requirements and schedules for the exhaust system

30,000

Inspect exhaust system for leaks and damage
Check oxygen sensor operation
Inspect catalytic converter for clogging

Ensure all components are securely fastened

60,000

Replace oxygen sensors
Inspect and replace exhaust hangers if necessary
Check exhaust pipe integrity

Use OEM parts for replacements

100,000

Replace catalytic converter if efficiency drops below 90%
Inspect and replace muffler if necessary
Perform full exhaust system inspection

Follow manufacturer guidelines for replacement intervals

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the diameter of the exhaust piping on the 1994-1997 Audi S6?

The exhaust piping on the 1994-1997 Audi S6 has a diameter of 60mm (2.36 inches) for the downpipe and 50mm (1.97 inches) for the mid-section and rear muffler. These dimensions are critical for maintaining proper exhaust flow and backpressure.

What type of catalytic converter is used in the 1994-1997 Audi S6?

The 1994-1997 Audi S6 is equipped with a dual-bed, ceramic monolith catalytic converter. It is designed to meet Euro 2 emissions standards and has a flow rate of approximately 400 CFM (cubic feet per minute).

What is the recommended torque specification for exhaust manifold bolts?

The exhaust manifold bolts on the 1994-1997 Audi S6 should be torqued to 25 Nm (18.4 ft-lbs) in a crisscross pattern to ensure even pressure distribution and prevent leaks.

Can I replace the stock exhaust with an aftermarket system without voiding the warranty?

Replacing the stock exhaust with an aftermarket system may void the warranty if the modification is deemed to have caused damage to other components. Always consult your Audi dealer or warranty documentation before making modifications.

What is the material composition of the stock exhaust system?

The stock exhaust system on the 1994-1997 Audi S6 is made from aluminized steel, which provides a balance of durability and corrosion resistance. The muffler and resonator are internally baffled for optimal noise reduction.

How often should the exhaust system be inspected?

The exhaust system should be inspected every 12 months or 15,000 miles, whichever comes first. Look for signs of rust, cracks, or loose components, and ensure all hangers and brackets are secure.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

Audi S6 Exhaust System Service Manual

Coming Soon

Official Audi service manual detailing exhaust system components, removal, installation, and troubleshooting procedures.

Exhaust System Maintenance Guide

Coming Soon

Comprehensive guide on maintaining and inspecting the exhaust system, including common issues and repair tips.

Catalytic Converter Replacement Procedure

Coming Soon

Step-by-step instructions for replacing the catalytic converter on the 1994-1997 Audi S6, including torque specifications and safety precautions.

Exhaust System Warranty Information

Coming Soon

Detailed information on Audi's warranty coverage for the exhaust system and implications of aftermarket modifications.

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