OAO High Performance Downpipe for BMW M135i / M235i / 335i / 435i / M2 (N55 EWG / PWG) T304 Stainless Steel Turbo Downpipe

Unlock the Full Potential of the Legendary N55 Platform

Designed specifically for BMW models equipped with the N55 3.0L turbocharged inline-six engine, including M135i, M235i, 335i, 435i, and M2 (both EWG and PWG variants), the OAO High Performance Downpipe is engineered to dramatically improve exhaust flow, reduce restriction, and enhance turbocharger responsiveness.

By replacing the restrictive factory downpipe, this system allows exhaust gases to exit more efficiently, helping the turbo spool faster and delivering a more aggressive and engaging driving experience.

Constructed from premium T304 stainless steel and precision TIG welded throughout, the OAO downpipe ensures long-term durability, heat resistance, and OEM-level fitment across multiple N55 platforms.

Key Features

✓ Designed for BMW M135i / M235i / 335i / 435i / M2

✓ Compatible with N55 EWG & PWG Variants

✓ 3.0L Turbocharged Inline-6 Platform

✓ Premium T304 Stainless Steel Construction

✓ High-Flow Performance Downpipe Design

✓ Precision TIG Welded

✓ Mandrel-Bent Tubing Construction

✓ Improved Exhaust Gas Flow Efficiency

✓ Reduced Exhaust Backpressure

✓ Faster Turbo Spool Response

✓ Sharper Throttle Reaction

✓ More Aggressive Exhaust Character

✓ OEM-Level Fitment

Why Upgrade Your Downpipe?

The factory downpipe is designed to meet strict emissions and noise regulations, which limits the full performance potential of the N55 engine.

The OAO High Performance Downpipe is designed for enthusiasts seeking sharper response, improved airflow, and a more exciting driving experience.

Potential benefits may include:

• Faster Turbo Spool

• Improved Exhaust Flow

• 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 directly after the turbocharger for maximum efficiency.

Benefits include:

• Improved Exhaust Flow Dynamics

• Reduced Turbulence

• Enhanced Turbo Efficiency

• Better High-RPM Breathing

• Improved Compatibility with Performance Exhaust Systems

Designed to unlock the true character of BMW’s N55 turbocharged platform.

Sound Characteristics

The OAO N55 downpipe enhances the factory exhaust note with a more aggressive and performance-oriented character.

Drivers may experience:

• Deeper Exhaust Tone

• Stronger Turbo Spool Sound

• Enhanced Blow-Off Acoustics

• More Aggressive Acceleration Note

• Increased Exhaust Presence

• Sportier Driving Character

Sound output will vary depending on the full exhaust system configuration.

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

• High Structural Strength

• Motorsport-Inspired Build Quality

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

Vehicle Fitment

Compatible with:

• BMW M135i (N55)

• BMW M235i (N55)

• BMW 335i (N55)

• BMW 435i (N55)

• BMW M2 (N55)

Variants Supported

• EWG (Electronic Wastegate)

• PWG (Pneumatic Wastegate)

Engine Platform

• N55 3.0L Turbocharged Inline-6

Model Years

• 2011

• 2012

• 2013

• 2014

• 2015

• 2016

• 2017

Please verify your vehicle configuration 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 BMW M, Mercedes-AMG, 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 BMW N55 platform with sharper response, improved exhaust flow, and the unmistakable performance character of OAO Performance.