OAO High Performance Downpipe for Mercedes-Benz A45 / CLA45 / GLA45 AMG 2.0T M133 Turbocharged Inline-4 T304 Stainless Steel Exhaust System

Unlock the Full Potential of the AMG M133 Platform

Designed specifically for Mercedes-AMG A45, CLA45, and GLA45 equipped with the legendary 2.0L M133 turbocharged inline-four engine, the OAO High Performance Downpipe is engineered to maximize exhaust flow, reduce restriction, and unleash the aggressive character of AMG’s compact performance platform.

By improving exhaust gas evacuation directly after the turbocharger, this system enhances turbo efficiency, sharpens throttle response, and delivers a more intense and motorsport-inspired driving experience.

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

Key Features

✓ Designed for Mercedes-AMG A45 / CLA45 / GLA45

✓ M133 2.0L Turbocharged Inline-4 Platform

✓ Premium T304 Stainless Steel Construction

✓ High-Flow Performance Downpipe Design

✓ Precision TIG Welded

✓ Mandrel-Bent Tubing Structure

✓ Improved Exhaust Gas Flow Efficiency

✓ Reduced Exhaust Backpressure

✓ Enhanced Turbocharger Response

✓ Sharper Throttle Reaction

✓ More Aggressive AMG Exhaust Character

✓ OEM-Level Fitment

Why Upgrade Your Downpipe?

The factory downpipe is engineered to meet strict emissions, noise, and durability standards, which limits the full performance and acoustic potential of the M133 engine.

The OAO High Performance Downpipe is designed for enthusiasts seeking sharper response, improved airflow, and a more engaging 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 downpipe is engineered to optimize exhaust gas evacuation immediately after the turbocharger, improving system efficiency and reducing turbulence.

Benefits include:

• Improved Exhaust Flow Dynamics

• Reduced Backpressure

• Enhanced Turbocharger Efficiency

• Better High-RPM Breathing

• Improved Compatibility with Performance Exhaust Systems

Designed to fully unlock the aggressive nature of AMG’s M133 platform.

Sound Characteristics

The OAO M133 downpipe enhances the factory AMG exhaust tone with a deeper, louder, and more aggressive character.

Drivers may experience:

• Deeper Exhaust Tone

• Stronger Turbo Spool Sound

• Enhanced Blow-Off Acoustics

• More Aggressive Acceleration Note

• Sharper Overrun Character

• Increased Exhaust Presence

Sound output will vary depending on the full exhaust 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-Grade Engineering

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

Vehicle Fitment

Compatible with:

• Mercedes-AMG A45 (W176)

• Mercedes-AMG CLA45 (C117)

• Mercedes-AMG GLA45 (X156)

Engine Platform

• M133 2.0L Turbocharged Inline-4

Model Years

• 2013

• 2014

• 2015

• 2016

• 2017

Please verify your vehicle configuration and exhaust setup before ordering.

Package Includes

• OAO High Performance Downpipe

• 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 tuning is highly recommended to maximize performance gains and prevent 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 Mercedes-AMG A45 / CLA45 / GLA45 with sharper response, improved exhaust flow, and the unmistakable performance character of OAO Performance.