OAO High Performance Downpipes for Mercedes-Benz W212 E63 AMG / C218 CLS63 AMG M157 5.5T Bi-Turbo V8 T304 Stainless Steel Exhaust

Unlock the True Potential of the AMG M157 Bi-Turbo V8

Designed specifically for the Mercedes-Benz E63 AMG (W212) and CLS63 AMG (C218) equipped with the legendary M157 5.5L Bi-Turbo V8 engine, the OAO High Performance Downpipes are engineered to dramatically improve exhaust flow, reduce backpressure, and unlock the full performance character of the AMG platform.

By replacing the restrictive factory downpipes, this system allows exhaust gases to exit the turbochargers more efficiently, improving spool response, throttle sensitivity, and overall driving dynamics.

Constructed from premium T304 stainless steel and precision TIG welded throughout, the OAO downpipes deliver exceptional durability, heat resistance, and OEM-level fitment.

Key Features

✓ Designed for Mercedes-Benz E63 AMG W212 / CLS63 AMG C218

✓ M157 5.5L Bi-Turbocharged V8 Platform

✓ Premium T304 Stainless Steel Construction

✓ High-Flow Performance Downpipes (Left & Right Set)

✓ Precision TIG Welded

✓ Mandrel-Bent Tubing Construction

✓ Improved Exhaust Gas Flow Efficiency

✓ Reduced Exhaust Backpressure

✓ Enhanced Turbocharger Response

✓ Sharper Throttle Reaction

✓ More Aggressive AMG V8 Character

✓ OEM-Level Fitment

Why Upgrade Your Downpipes?

The factory downpipes are designed to meet emissions compliance, noise regulations, and long-term durability standards, which limits the full performance potential of the M157 engine.

The OAO High Performance Downpipes are developed for enthusiasts seeking sharper response, improved turbo efficiency, and a more aggressive AMG driving experience.

Potential benefits may include:

• Faster Turbo Spool Response

• Improved Exhaust Flow Efficiency

• Reduced Exhaust Restriction

• Sharper Throttle Response

• Enhanced Engine Responsiveness

• More Aggressive Exhaust Sound

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

Performance Engineering Focus

The OAO downpipes are engineered to optimize exhaust gas evacuation immediately after each turbocharger, improving overall system efficiency and responsiveness.

Benefits include:

• Improved Exhaust Flow Dynamics

• Reduced Turbulence

• Enhanced Turbo Efficiency

• Better High-RPM Breathing

• Improved Exhaust System Compatibility

Designed to bring out the full potential of the AMG M157 Bi-Turbo V8 platform.

Sound Characteristics

The OAO M157 downpipes enhance the signature AMG V8 sound with a more aggressive and performance-focused character.

Drivers may experience:

• Deeper Exhaust Tone

• Stronger V8 Presence

• Enhanced Turbo Spool Acoustics

• More Aggressive Acceleration Sound

• Sharper Overrun Character

• Increased Exhaust Volume

Sound output will vary depending on the rest of the exhaust system configuration.

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-Inspired Build Quality

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

Vehicle Fitment

Compatible with:

• Mercedes-Benz E63 AMG W212

• Mercedes-Benz E63 AMG S W212

• Mercedes-Benz CLS63 AMG C218

• Mercedes-Benz CLS63 AMG S C218

Engine Platform

• M157 5.5L Bi-Turbocharged V8

Model Years

• 2011

• 2012

• 2013

• 2014

• 2015

• 2016

Please verify your vehicle configuration and exhaust setup before ordering.

Package Includes

• OAO High Performance Downpipes (Left & Right)

• Installation Hardware Kit

• Protective Packaging

Installation

Direct bolt-on design utilizing factory mounting points.

Professional installation is strongly recommended for optimal fitment and performance.

ECU calibration is highly recommended to maximize performance gains and avoid potential warning lights.

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 Mercedes-AMG, BMW M, Audi RS, Porsche, Ferrari, Lamborghini, and other high-performance platforms.

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

Upgrade your AMG E63 or CLS63 with sharper response, improved exhaust flow, and the unmistakable performance character of OAO Performance.