BMW M6 2012-2018

BMW M6 2012-2018 Exhaust Specifications

Detailed technical guide and specifications for the 2012-2018 BMW M6 exhaust system, covering components, materials, dimensions, and maintenance. Ideal for technicians and enthusiasts.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the exhaust specifications for the 2012-2018 BMW M6, including key features, measurements, and technical details. This section provides detailed insights into the exhaust system's design, components, and performance characteristics.

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 (Primary)

60 mm (2.36 in)

Exhaust Pipe Diameter (Secondary)

70 mm (2.75 in)

Catalytic Converter Efficiency

Up to 95% reduction in CO and NOx

Muffler Weight

12.5 kg (27.56 lbs)

Sound Pressure Level (Sport+ Mode)

Up to 95 dB

Available Specifications

Exhaust System Overview

This section provides an overview of the BMW M6's exhaust system, including its design, materials, and key components.

Exhaust System Design

Dual exhaust system with quad tailpipes
Stainless steel construction for durability and corrosion resistance
Optimized for high-performance output and reduced backpressure
Integrated with the vehicle's ECU for dynamic exhaust valve control

Key Components

Primary catalytic converters located near the exhaust manifolds
Secondary catalytic converters integrated into the mid-pipe section
Twin mufflers with active sound tuning technology
Exhaust valves for adjustable sound and performance modes

Note: The active exhaust system adjusts sound and performance based on driving mode (Comfort, Sport, or Sport+).

Exhaust Pipe Specifications

This section details the dimensions and materials used in the exhaust pipes, including primary and secondary sections.

Primary Exhaust Pipes

Diameter: 60 mm (2.36 in)
Material: High-grade stainless steel
Wall thickness: 1.5 mm (0.059 in)
Designed to withstand temperatures up to 900°C (1652°F)

Secondary Exhaust Pipes

Diameter: 70 mm (2.75 in)
Material: Stainless steel with heat-resistant coating
Wall thickness: 1.8 mm (0.071 in)
Integrated with secondary catalytic converters

Note: The secondary pipes are designed to reduce emissions while maintaining optimal exhaust flow.

Catalytic Converters

This section covers the specifications and functionality of the primary and secondary catalytic converters.

Primary Catalytic Converters

Located directly after the exhaust manifolds
Ceramic honeycomb substrate with platinum and rhodium coating
Operating temperature range: 400°C to 800°C (752°F to 1472°F)
Efficiency: Reduces CO and NOx emissions by up to 95%

Secondary Catalytic Converters

Integrated into the mid-pipe section
Metallic substrate for improved durability
Operating temperature range: 300°C to 700°C (572°F to 1292°F)
Efficiency: Further reduces HC and NOx emissions

Note: The secondary converters are designed to meet Euro 6 emission standards.

Mufflers and Sound Tuning

This section provides details on the mufflers and the active sound tuning system.

Muffler Design

Twin mufflers with internal baffles for sound dampening
Material: Stainless steel with heat-resistant coating
Weight: 12.5 kg (27.56 lbs) per muffler
Integrated exhaust valves for sound modulation

Active Sound Tuning

Adjustable exhaust valve system controlled by the ECU
Three sound modes: Comfort, Sport, and Sport+
Valve diameter: 50 mm (1.97 in)
Sound pressure level: Up to 95 dB in Sport+ mode

Note: The active sound tuning system enhances the driving experience by providing customizable exhaust notes.

Search Specifications

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Component Specifications

General information

System Type: Dual exhaust system with quad tailpipes

Material: Stainless steel

Configuration: Rear-mounted, dual mufflers with cross-pipe

Emission Compliance: Euro 6 / Tier 2 Bin 5

Part Number: 18307608910

Exhaust Manifold

Material: Cast iron with heat-resistant coating

Bolt Torque: 25 Nm (18.4 ft-lbs)

Gasket Part Number: 11627559521

Heat Shield Material: Aluminum

Heat Shield Part Number: 11627559522

Catalytic Converter

Type: Dual catalytic converters

Material: Ceramic substrate with platinum-rhodium coating

Efficiency: >98%

Part Number: 18307541763

Temperature Range: 400°C - 900°C (752°F - 1652°F)

Replacement interval: 120,000 miles or 10 years

Mufflers

Type: Dual chamber with perforated tubes

Material: Stainless steel

Part Number: 18307608911

Sound Level: 72 dB at 3000 RPM

Weight: 8.5 kg (18.7 lbs) each

Tailpipes

Diameter: 90 mm (3.54 inches)

Material: Polished stainless steel

Finish: Chrome-plated

Part Number: 18307608912

Alignment Tolerance: ±2 mm

Exhaust Flanges

Material: Stainless steel

Bolt Size: M10 x 1.5

Bolt Torque: 40 Nm (29.5 ft-lbs)

Gasket Part Number: 18307541764

Heat Shield Part Number: 18307541765

Oxygen Sensors

Type: Wideband zirconia sensors

Location

Pre-catalytic converter
Post-catalytic converter

Part Number

11787558021
11787558022

Operating Temperature: -40°C to 900°C (-40°F to 1652°F)

Replacement interval: 100,000 miles

Exhaust Hangers

Material: Rubber with steel reinforcement

Quantity: 6

Part Number: 18307608913

Load Capacity: 15 kg (33 lbs) each

Replacement interval: Inspect every 30,000 miles

Exhaust Valve Control

Type: Electronically controlled exhaust flap

Actuator Part Number: 18307608914

Operating Voltage: 12V DC

Response Time: <0.5 seconds

Control Module Part Number: 18307608915

Exhaust Thermal Management

Heat Shield Material: Aluminum with ceramic coating

Heat Shield Part Number: 18307608916

insulation Thickness: 5 mm (0.2 inches)

Maximum Surface Temperature: 120°C (248°F)

inspection Interval: Every 15,000 miles

Service Information Service

Detailed service requirements and schedules for the exhaust system

15,000

Inspect exhaust hangers for wear
Check for exhaust leaks
Inspect heat shields for damage

Ensure all bolts are torqued to specification

30,000

Inspect catalytic converter for damage
Check oxygen sensor operation
Inspect exhaust valve control system

Replace oxygen sensors if fault codes are present

60,000

Inspect mufflers for corrosion
Check tailpipe alignment
Inspect exhaust flanges and gaskets

Replace gaskets if leaks are detected

100,000

Replace oxygen sensors
Inspect catalytic converter efficiency
Check exhaust valve actuator operation

Perform diagnostic scan for exhaust system faults

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the exhaust system configuration for the 2012-2018 BMW M6?

The 2012-2018 BMW M6 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.

What is the diameter of the exhaust pipes on the BMW M6?

The primary exhaust pipes on the 2012-2018 BMW M6 have a 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.

Does the BMW M6 exhaust system include a valve-controlled exhaust?

Yes, the 2012-2018 BMW M6 is equipped with an electronically controlled exhaust valve system. This system adjusts the exhaust flow based on driving conditions, providing a quieter sound during normal driving and a more aggressive tone during sport or performance modes.

What materials are used in the BMW M6 exhaust system?

The exhaust system is constructed from high-quality stainless steel, which provides excellent corrosion resistance and durability. The tailpipes are finished with chrome plating for a premium appearance.

Can aftermarket exhaust systems affect the BMW M6's performance?

Aftermarket exhaust systems can alter the performance and sound of the BMW M6. However, improper installation or non-compliant systems may void the vehicle's warranty, reduce performance, or cause emissions-related issues. Always consult with a BMW-certified technician before making modifications.

Factory Service Resources

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

BMW M6 Exhaust System Technical Guide

Coming Soon

Detailed technical specifications and diagrams for the 2012-2018 BMW M6 exhaust system, including part numbers and installation instructions.

BMW M6 Exhaust Valve System Overview

Coming Soon

Learn about the electronically controlled exhaust valve system, its operation, and troubleshooting tips for the 2012-2018 BMW M6.

BMW M6 Exhaust Maintenance Checklist

Coming Soon

A comprehensive guide to maintaining the exhaust system, including inspection intervals, cleaning tips, and common issues for the 2012-2018 BMW M6.

BMW M6 Exhaust Sound Comparison

Coming Soon

Compare the stock exhaust sound with aftermarket options for the 2012-2018 BMW M6, including performance and sound quality differences.

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