Audi Audi S8 2012-2018 Exhaust Specifications
Detailed technical specifications and documentation for the 2012-2018 Audi S8 exhaust system, including exhaust manifold, catalytic converters, mufflers, and tailpipes. Ideal for technicians and enthusiasts.
Overview Specifications
Comprehensive description of the exhaust specifications for the 2012-2018 Audi S8, including key features, measurements, and technical details. This section covers the exhaust system's design, components, and performance specifications.
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
2.5 inches (63.5 mm)
Catalytic Converter Efficiency
98%
Muffler Weight
12.5 kg (27.5 lbs)
Maximum Flow Rate
450 CFM
Idle Sound Level
45 dB
Available Specifications
Exhaust System Design
Details about the overall design and layout of the exhaust system, including materials, routing, and integration with other vehicle systems.
Exhaust System Design
Details about the overall design and layout of the exhaust system, including materials, routing, and integration with other vehicle systems.
Exhaust Routing and Configuration
- Dual exhaust system with quad tailpipes
- Stainless steel construction for durability
- Optimized routing for minimal backpressure
- Integrated with the vehicle's underbody for aerodynamic efficiency
Exhaust Materials and Coatings
- High-grade stainless steel for corrosion resistance
- Heat-resistant coatings on critical components
- Aluminized steel used in specific sections for weight reduction
- Ceramic-coated exhaust tips for enhanced aesthetics
Note: The use of stainless steel ensures longevity and resistance to harsh environmental conditions.
Exhaust Components
Detailed breakdown of the major components of the exhaust system, including the catalytic converter, muffler, and exhaust pipes.
Exhaust Components
Detailed breakdown of the major components of the exhaust system, including the catalytic converter, muffler, and exhaust pipes.
Catalytic Converter Specifications
- Dual catalytic converters for each exhaust bank
- Ceramic honeycomb substrate with precious metal coating
- Efficiency rating of 98% for harmful emissions reduction
- Operating temperature range: 400°C to 800°C
Muffler and Resonator Details
- Twin-chamber muffler design for noise reduction
- Integrated resonator for sound tuning
- Internal baffles optimized for performance and sound quality
- Weight: 12.5 kg (27.5 lbs)
Note: The muffler design balances noise reduction with minimal performance impact.
Performance Specifications
Technical details related to the exhaust system's performance, including backpressure, flow rates, and sound levels.
Performance Specifications
Technical details related to the exhaust system's performance, including backpressure, flow rates, and sound levels.
Exhaust Flow and Backpressure
- Maximum flow rate: 450 CFM (cubic feet per minute)
- Backpressure at peak RPM: 1.2 psi
- Optimized for the 4.0L V8 engine's output
- Designed to support up to 520 horsepower
Sound Levels and Tuning
- Idle sound level: 45 dB
- Full-throttle sound level: 85 dB
- Active exhaust valves for sound modulation
- Tuned for a sporty yet refined exhaust note
Note: Active exhaust valves allow for customizable sound profiles.
Search Specifications
Search by specification name, value, or description
Type to search through torque specifications. Results will appear below as you type.
Component Specifications
General Specifications
- Material
- Stainless steel
- System Type
- Dual exhaust with quad tips
- Configuration
- Rear-mounted
- Emission Compliance
- Euro 6 / Tier 2 Bin 5
- Part Number
- 4G0253100A
Exhaust Manifold
- Material
- Cast iron
- Bolt Torque
- 25 Nm
- Gasket Part Number
- 07L253117A
- Heat Shield Material
- Aluminized steel
- Heat Shield Part Number
- 4G0253115B
Catalytic Converter
- Type
- Three-way catalytic converter
- Material
- Ceramic substrate with platinum-rhodium coating
- Part Number
- 4G0254100C
- Operating Temperature
- 400-800°C
- Efficiency
- >95%
- Replacement interval
- 120,000 miles
Resonator
- Type
- Helmholtz resonator
- Material
- Stainless steel
- Part Number
- 4G0252600D
- Diameter
- 100 mm
- Length
- 300 mm
Muffler
- Type
- Dual-chamber muffler
- Material
- Stainless steel
- Part Number
- 4G0253100B
- Diameter
- 120 mm
- Length
- 600 mm
- Sound Level
- 72 dB at 3000 RPM
Exhaust Tips
- Material
- Polished stainless steel
- Diameter
- 90 mm
- Length
- 150 mm
- Part Number
- 4G0253110E
- Finish
- Chrome-plated
Oxygen Sensors
- Type
- Wideband zirconia sensor
- Part Number
- 06E906262B
- Location
- Pre-catalytic and post-catalytic
- Operating Temperature
- -40°C to 900°C
- Replacement interval
- 100,000 miles
Exhaust Pipes
- Material
- Stainless steel
- Diameter
- 70 mm
- Wall Thickness
- 1.5 mm
- Part Number
- 4G0253115A
- Bend Radius
- 150 mm
Mounting System
- Hanger Material
- Rubber with steel core
- Hanger Part Number
- 4G0253115C
- Bolt Torque
- 20 Nm
- Vibration Damping
- 85%
- Heat Shield Part Number
- 4G0253115D
Performance Parameters
- Back Pressure
- <0.5 bar at 6000 RPM
- Exhaust Gas Temperature
- Max 950°C
- Flow Rate
- 450 CFM at 6000 RPM
- Weight
- 28 kg
Service Information Service
Detailed service requirements and schedules for the exhaust system
- Inspect exhaust system for leaks
- Check mounting system for wear
- Inspect oxygen sensors for proper operation
Regular inspection is required to ensure optimal performance and compliance with emission standards.
- Replace oxygen sensors
- Inspect catalytic converter for efficiency
- Check exhaust hangers and replace if necessary
Replacement of oxygen sensors is recommended to maintain emission compliance.
- Inspect and replace catalytic converter if necessary
- Check exhaust pipes for corrosion
- Inspect muffler and resonator for damage
Comprehensive inspection and replacement of components as needed to ensure system integrity.
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the exhaust system configuration for the 2012-2018 Audi S8?
What is the exhaust system configuration for the 2012-2018 Audi S8?
The 2012-2018 Audi S8 features a dual exhaust system with quad tailpipes. It includes two catalytic converters, two resonators, and two mufflers. The system is designed to optimize exhaust flow and reduce backpressure, enhancing performance and sound quality.
Q2 What is the diameter of the exhaust pipes on the Audi S8?
What is the diameter of the exhaust pipes on the Audi S8?
The primary exhaust pipes on the Audi S8 have an outer diameter of 70 mm (2.75 inches). The tailpipes are 90 mm (3.54 inches) in diameter, contributing to the vehicle's aggressive exhaust note and improved airflow.
Q3 Does the Audi S8 exhaust system include a valve-controlled exhaust?
Does the Audi S8 exhaust system include a valve-controlled exhaust?
Yes, the Audi S8 is equipped with a valve-controlled exhaust system. The valves open and close based on engine load and RPM, allowing for a quieter exhaust note during low-speed driving and a more aggressive sound during high-performance driving.
Q4 What materials are used in the Audi S8 exhaust system?
What materials are used in the Audi S8 exhaust system?
The Audi S8 exhaust system is constructed from high-quality stainless steel, ensuring durability and resistance to corrosion. The tailpipes are finished with a polished chrome or black chrome coating, depending on the trim and options selected.
Q5 Can the Audi S8 exhaust system be upgraded for better performance?
Can the Audi S8 exhaust system be upgraded for better performance?
Yes, aftermarket exhaust systems are available for the Audi S8, offering improved flow and reduced weight. However, modifications may void the vehicle's warranty and should be performed by a certified technician to ensure proper fitment and compliance with emissions regulations.
Q6 What is the recommended service interval for the exhaust system?
What is the recommended service interval for the exhaust system?
Audi recommends inspecting the exhaust system every 15,000 miles or 12 months, whichever comes first. This includes checking for leaks, corrosion, and damage to the catalytic converters, mufflers, and hangers.
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 S8 Exhaust System Technical Guide
Coming SoonA detailed guide covering the design, components, and maintenance of the Audi S8 exhaust system.
Audi Genuine Parts Catalog
Coming SoonAccess the official Audi parts catalog to find genuine exhaust components for the 2012-2018 S8.
Audi S8 Performance Upgrades
Coming SoonExplore performance exhaust options and other upgrades for the Audi S8, including compatibility and installation tips.
Audi Service and Maintenance Schedule
Coming SoonDownload the official service schedule for the Audi S8, including exhaust system inspection and maintenance intervals.
About the Author
Expert automotive knowledge and experience
'/%3E%3Cpath d='M60 30a20 20 0 1 1 0 40 20 20 0 0 1 0-40zm0 45c16.5 0 30 7.5 30 16.8V100H30v-8.2c0-9.3 13.5-16.8 30-16.8z' fill='%23404040'/%3E%3C/svg%3E)
Diagnostic
Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.
Repair
Expert in both traditional mechanical repairs and modern vehicle systems.
Additional Expertise
Documentation
Created over 500 detailed repair guides and technical documents.
Training
Conducted technical training sessions and contributed to repair databases.
Certifications & Research
Certifications
- ASE Master Technician Certification
- Advanced Diagnostic Specialist
- Hybrid/Electric Vehicle Systems
- Performance Tuning Expert
Research & Community
Actively researches emerging technologies and contributes to automotive forums.
Legal Disclaimer
Important information about using this content
Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.
General Information
Warranty & Liability
The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.
We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.
Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.