OAO Valved Cat-Back Exhaust System for BMW F80 M3 / F82 M4 S55 3.0T T304 Stainless Steel Performance Exhaust

Unlock the True Character of the S55 Twin-Turbo M Engine

Designed specifically for the BMW F80 M3 and F82 M4, the OAO Valved Cat-Back Exhaust System is engineered to enhance exhaust flow, refine sound output, and unlock a more aggressive and emotional driving experience from the S55 3.0L twin-turbocharged inline-six engine.

This system transforms the factory exhaust note into a deeper, sharper, and more motorsport-inspired sound while maintaining daily usability through intelligent valve control.

Constructed from premium T304 stainless steel and precision TIG welded throughout, the system delivers OEM-level fitment, long-term durability, and performance-focused engineering.

Key Features

✓ Designed for BMW F80 M3 / F82 M4

✓ S55 3.0L Twin-Turbocharged Inline-6 Platform

✓ Premium T304 Stainless Steel Construction

✓ Electronic Valved Exhaust System

✓ High-Flow Cat-Back Design

✓ Precision TIG Welded

✓ Direct Bolt-On Installation

✓ Improved Exhaust Flow Efficiency

✓ Reduced Exhaust Backpressure

✓ Enhanced Turbocharged M Sound

✓ Lightweight Performance Construction

✓ OEM-Level Fitment

Intelligent Valve Control System

Comfort Mode

With the valves closed, the system delivers a refined and comfortable exhaust tone suitable for daily driving.

Perfect for:

• City Commuting

• Highway Cruising

• Low-Noise Driving

• Long Distance Travel

Sport Mode

Open the valves and unleash the full aggression of the S55 M engine.

Benefits include:

• Louder Exhaust Output

• Deeper Turbocharged Tone

• Stronger Exhaust Presence

• Sharper Acceleration Sound

• Enhanced Downshift Burble

• More Engaging Driving Feel

Performance Benefits

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

Potential benefits may include:

• Improved Exhaust Flow

• Reduced Backpressure

• Sharper Throttle Response

• Enhanced Turbo Sound Character

• Improved Engine Response Feel

• More Dynamic Driving Experience

Performance gains may vary depending on ECU tuning and supporting modifications.

Sound Characteristics

The OAO F8X exhaust system is tuned to refine the iconic S55 sound profile:

• Deep and Controlled Idle Tone

• Strong Mid-Range Turbo Presence

• Enhanced Turbo Spool Sound

• Aggressive High-RPM Acoustics

• Motorsport-Inspired Exhaust Note

• Balanced Street and Track Character

Designed to bring out the full personality of BMW M performance without sacrificing daily comfort.

Premium T304 Stainless Steel Construction

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

Advantages include:

• Excellent Corrosion Resistance

• High Heat Resistance

• Long Service Life

• Lightweight Performance Design

• Superior Structural Strength

Each system is precision TIG welded and thoroughly inspected to ensure consistent quality and fitment.

Vehicle Fitment

Compatible with:

• BMW M3 F80

• BMW M4 F82

• BMW M4 F83 Convertible

Engine Platform

• S55 3.0L Twin-Turbocharged Inline-6

Model Years

• 2014

• 2015

• 2016

• 2017

• 2018

Please verify your vehicle specifications 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 for optimal fitment and performance.

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, mid-pipes, and downpipes to titanium exhaust solutions and OEM/ODM manufacturing, every OAO product is engineered to deliver precision fitment, durability, and a truly engaging driving experience.

Upgrade your F80 M3 or F82 M4 with sharper sound, stronger presence, and authentic motorsport character.