OAO Valved Cat-Back Exhaust System for Mercedes-Benz AMG GT / GTS / GTC / GTR M178 4.0T V8 T304 Stainless Steel Performance Exhaust

Unleash the True Sound of the AMG Handcrafted V8

Designed specifically for the Mercedes-Benz AMG GT series, the OAO Valved Cat-Back Exhaust System is engineered to maximize exhaust flow, enhance acoustic performance, and unleash the full character of the handcrafted M178 4.0L Bi-Turbo V8 engine.

Developed for enthusiasts seeking a more emotional and motorsport-inspired driving experience, this system transforms the factory exhaust note into a deeper, louder, and more aggressive AMG soundtrack while preserving comfort during everyday driving.

Constructed from premium T304 stainless steel and precision TIG welded throughout, the OAO exhaust system delivers exceptional durability, heat resistance, and OEM-quality fitment.

Key Features

✓ Designed for Mercedes-Benz AMG GT Series

✓ M178 4.0L Bi-Turbocharged V8 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 AMG V8 Sound Character

✓ Lightweight Performance Construction

✓ OEM-Level Fitment

Intelligent Valve Control System

Comfort Mode

With the valves closed, the exhaust system delivers a refined grand touring experience while maintaining the luxurious characteristics expected from the AMG GT platform.

Perfect for:

• Daily Driving

• Highway Cruising

• Long Distance Touring

• Urban Driving

• Reduced Cabin Noise

Race Mode

Open the valves and unleash the full potential of the AMG Bi-Turbo V8.

Benefits include:

• Maximum Exhaust Volume

• Deeper V8 Tone

• Enhanced Turbocharger Acoustics

• Aggressive Acceleration Sound

• Sharper Downshift Crackles

• Increased Driver Engagement

• Motorsport-Inspired Driving Experience

Performance Benefits

The OAO Cat-Back Exhaust System is engineered to improve exhaust efficiency and elevate driving enjoyment.

Potential benefits may include:

• Improved Exhaust Flow

• Reduced Backpressure

• Sharper Throttle Response

• Enhanced Turbocharger Performance Feel

• Stronger Engine Character

• Increased Driving Excitement

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

Sound Characteristics

The OAO AMG GT exhaust system is carefully tuned to highlight the signature character of the M178 engine.

Drivers may experience:

• Deep and Powerful Idle Tone

• Rich Mid-Range V8 Presence

• Enhanced Turbocharged Acoustics

• Aggressive High-RPM Sound

• Sharper Gear Change Acoustics

• Distinctive AMG Exhaust Signature

Designed to deliver the perfect balance between luxury grand touring refinement and race-inspired performance sound.

Premium T304 Stainless Steel Construction

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

Advantages include:

• Excellent Corrosion Resistance

• Superior Heat Resistance

• Long Service Life

• Lightweight Performance Design

• High Structural Strength

Every exhaust system is precision TIG welded and thoroughly inspected before shipment.

Vehicle Fitment

Compatible with:

• Mercedes-AMG GT

• Mercedes-AMG GT S

• Mercedes-AMG GT C

• Mercedes-AMG GT R

Engine Platform

• M178 4.0L Bi-Turbocharged V8

Model Years

• 2015

• 2016

• 2017

• 2018

• 2019

• 2020

• 2021

• 2022

• 2023

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 locations.

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

Why Choose OAO Performance

OAO specializes in premium performance exhaust systems for Mercedes-AMG, Porsche, BMW M, Audi RS, Ferrari, Lamborghini, McLaren, 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 exceptional craftsmanship, precise fitment, superior sound quality, and a truly engaging driving experience.

Transform your AMG GT into an even more exhilarating machine with the unmistakable sound and performance character of OAO Performance.