OAO Valved Cat-Back Exhaust System for BMW F06 / F12 / F13 640i N55 3.0T Inline-6 T304 Stainless Steel Performance Exhaust

Refine the Grand Coupe Experience of the N55 Platform

Designed specifically for the BMW 640i Gran Coupe (F06), Convertible (F12), and Coupe (F13) equipped with the N55 3.0L turbocharged inline-six engine, the OAO Valved Cat-Back Exhaust System is engineered to enhance exhaust flow, refine sound character, and elevate the luxury-performance balance of BMW’s flagship 6 Series.

This system is designed to unlock a deeper, more responsive, and more engaging exhaust tone while maintaining the refinement and comfort expected from a grand touring BMW.

Constructed from premium T304 stainless steel and precision TIG welded throughout, the OAO exhaust system ensures durability, corrosion resistance, and OEM-level fitment.

Key Features

✓ Designed for BMW F06 / F12 / F13 640i

✓ N55 3.0L Turbocharged Inline-6 Platform

✓ Premium T304 Stainless Steel Construction

✓ Electronic Valved Cat-Back Exhaust System

✓ High-Flow Performance Design

✓ Precision TIG Welded

✓ Mandrel-Bent Tubing Structure

✓ Improved Exhaust Flow Efficiency

✓ Reduced Exhaust Backpressure

✓ Enhanced Turbocharged Sound Character

✓ Lightweight Performance Construction

✓ OEM-Level Fitment

Intelligent Valve Control System

Comfort Mode

With the valves closed, the system maintains a refined and quiet exhaust tone suitable for daily driving and long-distance touring.

Ideal for:

• Daily Commuting

• Highway Cruising

• Business Use

• Long-Distance Travel

• Luxury Driving Comfort

Sport Mode

Open the valves and reveal the full character of the N55 turbocharged inline-six.

Benefits include:

• Louder Exhaust Output

• Deeper Turbocharged Tone

• Enhanced Engine Presence

• Sharper Acceleration Sound

• More Aggressive Downshift Acoustics

• Increased Driving Engagement

Performance Benefits

The OAO Cat-Back Exhaust System is engineered to improve exhaust efficiency while enhancing overall driving dynamics.

Potential benefits may include:

• Improved Exhaust Flow

• Reduced Backpressure

• Sharper Throttle Response

• Enhanced Turbo Spool Character

• Improved Engine Responsiveness

• More Dynamic Driving Experience

Actual performance gains may vary depending on ECU tuning and supporting modifications.

Sound Characteristics

The OAO F06/F12/F13 exhaust system is tuned to highlight the smooth yet sporty character of the N55 engine.

Drivers may experience:

• Refined Deep Idle Tone

• Strong Mid-Range Turbo Presence

• Enhanced Inline-6 Character

• Aggressive High-RPM Sound

• Balanced Luxury and Sport Exhaust Note

• Reduced Factory Sound Restriction

Designed to elevate the 6 Series into a more emotional grand touring experience.

Premium T304 Stainless Steel Construction

Manufactured from high-grade T304 stainless steel for maximum durability and long-term performance.

Advantages include:

• Excellent Corrosion Resistance

• Superior Heat Resistance

• Long Service Life

• High Structural Strength

• Motorsport-Grade Engineering

Each system is precision TIG welded and individually inspected before shipment.

Vehicle Fitment

Compatible with:

• BMW 640i Gran Coupe (F06)

• BMW 640i Coupe (F13)

• BMW 640i Convertible (F12)

Engine Platform

• N55 3.0L Turbocharged Inline-6

Model Years

• 2012

• 2013

• 2014

• 2015

• 2016

• 2017

• 2018

Please verify your vehicle specifications and exhaust configuration before ordering.

Package Includes

• OAO Valved Cat-Back Exhaust System

• Electronic Valve Control Module

• Remote Controllers

• Installation Hardware Kit

• Protective Packaging

Installation

Direct bolt-on design utilizing factory mounting points.

Professional installation is strongly recommended to ensure optimal fitment and performance.

Important Notes

Please check local emissions regulations before installation.

This product is intended for off-road or motorsport use where permitted by law.

Why Choose OAO Performance

OAO specializes in premium performance exhaust systems for BMW M, Mercedes-AMG, Audi RS, Porsche, Ferrari, Lamborghini, and other high-performance platforms.

From valved cat-back systems and downpipes to titanium exhaust solutions, every OAO product is engineered to deliver precision fitment, durability, and a truly engaging driving experience.

Upgrade your BMW 6 Series with sharper response, improved exhaust flow, and the refined performance character of OAO Performance.