OAO Valved Cat-Back Exhaust System for BMW F91 / F92 / F93 M8 4.4T S63 T304 Stainless Steel Performance Exhaust

Elevate the Sound and Presence of Your BMW M8

Designed specifically for the BMW F91 M8 Coupe, F92 M8 Competition Coupe, and F93 M8 Gran Coupe, the OAO Valved Cat-Back Exhaust System is engineered to unlock the full character of the S63 4.4L Twin-Turbo V8 engine.

This system is developed to improve exhaust flow, enhance sound dynamics, and deliver a more aggressive yet refined M performance experience—while maintaining daily driving comfort when needed.

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

Key Features

✓ Designed for BMW F91 / F92 / F93 M8

✓ S63 4.4L Twin-Turbocharged V8 Platform

✓ Premium T304 Stainless Steel Construction

✓ Electronic Valved Exhaust System

✓ High-Flow Cat-Back Design

✓ Precision TIG Welded

✓ Direct Bolt-On Installation

✓ Enhanced Exhaust Flow Efficiency

✓ Reduced Exhaust Backpressure

✓ Aggressive Yet Refined V8 Sound

✓ Lightweight Performance Construction

✓ OEM-Level Fitment

Intelligent Valve Control System

Comfort Mode

With the valves closed, the system maintains a smooth and refined exhaust note for daily driving and long-distance cruising.

Perfect for:

• City Driving

• Highway Cruising

• Luxury Daily Use

• Reduced Cabin Noise

Sport Mode

Open the valves and unleash the full character of the BMW M8 S63 V8.

Benefits include:

• Louder Exhaust Output

• Deeper V8 Tone

• Enhanced Twin-Turbo Character

• Sharper Acceleration Sound

• More Aggressive Downshift Acoustics

• Increased Driving Engagement

Performance Benefits

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

Potential benefits may include:

• Improved Exhaust Flow

• Reduced Backpressure

• Sharper Throttle Response

• Enhanced Turbocharged V8 Sound

• Improved Engine Character

• More Engaging Driving Experience

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

Sound Characteristics

The OAO M8 exhaust system is tuned to deliver a balanced performance sound profile:

• Deep and Controlled Idle Tone

• Strong Mid-Range V8 Presence

• Enhanced Turbo Acoustics

• Aggressive High-RPM Sound

• Refined Sport Mode Exhaust Note

• Comfortable Cruise Mode Operation

Designed to enhance the M8’s luxury GT character while adding motorsport aggression when desired.

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 individually inspected to ensure consistent quality and fitment.

Vehicle Fitment

Compatible with:

• BMW M8 Coupe (F92)

• BMW M8 Competition Coupe (F92)

• BMW M8 Convertible (F91)

• BMW M8 Competition Convertible (F91)

• BMW M8 Gran Coupe (F93)

• BMW M8 Competition Gran Coupe (F93)

Engine Platform

• S63 4.4L Twin-Turbocharged V8

Model Years

• 2019+

• 2020+

• 2021+

• 2022+

• 2023+

• 2024+

• 2025+

• 2026+

Please verify your vehicle 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 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 and downpipes to titanium exhaust solutions and OEM/ODM manufacturing, every OAO product is engineered to deliver precision fitment, durability, and an elevated driving experience.

Upgrade your BMW M8 with sharper sound, stronger presence, and true motorsport character.