OAO High Performance Downpipe for BMW F10/F18 535i • F06/F12/F13 640i • F15 X5 35i • F16 X6 35i N55 3.0T T304 Stainless Steel Exhaust System

Unlock the Full Potential of the BMW N55 Turbocharged Inline-6

Engineered specifically for BMW vehicles equipped with the legendary N55 3.0L turbocharged inline-six engine, the OAO High Performance Downpipe is designed to maximize exhaust flow, reduce turbo backpressure, and unleash the true performance potential of BMW's award-winning powerplant.

Replacing the restrictive factory downpipe allows exhaust gases to exit the turbocharger more efficiently, resulting in quicker turbo spool, sharper throttle response, improved engine efficiency, and a deeper, more aggressive exhaust note.

Manufactured from premium T304 stainless steel with precision TIG welding and CNC-machined flanges, every OAO downpipe is built for exceptional durability, outstanding heat resistance, and precise OEM-quality fitment.

Key Features

✓ Designed for BMW N55 3.0T Models

✓ Premium T304 Stainless Steel Construction

✓ High-Flow Performance Downpipe

✓ Available in Catless or High-Flow Sport Catalytic Versions

✓ Precision TIG Welded

✓ Mandrel-Bent Tubing

✓ CNC Precision-Machined Flanges

✓ Reduced Exhaust Backpressure

✓ Improved Turbocharger Efficiency

✓ Faster Turbo Response

✓ Enhanced Exhaust Sound

✓ OEM-Level Direct Bolt-On Installation

Why Upgrade Your Downpipe?

The factory downpipe is designed primarily to meet emissions regulations and noise standards, creating unnecessary restriction immediately after the turbocharger.

The OAO High Performance Downpipe significantly improves exhaust flow, allowing the N55 engine to operate more efficiently while providing a noticeable improvement in responsiveness and driving enjoyment.

Potential benefits may include:

• Faster Turbo Spool

• Improved Exhaust Flow

• Reduced Exhaust Restriction

• Sharper Throttle Response

• Enhanced Mid-Range Torque

• Improved High-RPM Performance

• Better Turbo Efficiency

• Excellent Compatibility with ECU Tunes and Performance Exhaust Systems

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

Motorsport-Inspired Engineering

Developed using advanced flow analysis and motorsport engineering principles, the OAO downpipe minimizes turbulence while maximizing exhaust gas velocity.

Engineering highlights include:

• Large-Diameter High-Flow Tubing

• Optimized Exhaust Gas Transition

• Reduced Backpressure

• Improved Thermal Efficiency

• Enhanced Turbocharger Performance

• Seamless Integration with Factory or Aftermarket Cat-Back Exhaust Systems

Designed for both high-performance street applications and track use.

Sound Characteristics

The OAO Performance Downpipe transforms the character of the BMW N55 engine.

Drivers may experience:

• Deeper Cold Start

• Enhanced Turbo Spool Acoustics

• Richer Inline-6 Exhaust Note

• Sharper Acceleration Sound

• More Aggressive Overrun Burbles (ECU dependent)

• Increased Overall Exhaust Volume

• Improved High-RPM Exhaust Tone

When paired with an OAO Valved Exhaust System, the result is a refined yet exhilarating performance sound.

Premium T304 Stainless Steel Construction

Manufactured from motorsport-grade T304 stainless steel for exceptional durability under extreme operating conditions.

Advantages include:

• Excellent Corrosion Resistance

• Superior Heat Resistance

• High Structural Strength

• Long Service Life

• Precision CNC-Machined Flanges

• Fully TIG Welded Construction

Every OAO downpipe undergoes rigorous quality inspection before shipment.

Vehicle Fitment

Compatible with:

• BMW 535i (F10 / F18)

• BMW 640i Coupe (F13)

• BMW 640i Convertible (F12)

• BMW 640i Gran Coupe (F06)

• BMW X5 xDrive35i (F15)

• BMW X6 xDrive35i (F16)

Engine Platform

• N55 3.0L Turbocharged Inline-6

Model Years

BMW 535i (F10/F18)
2010–2017

BMW 640i (F06/F12/F13)
2011–2018

BMW X5 xDrive35i (F15)
2014–2018

BMW X6 xDrive35i (F16)
2015–2019

Please verify your vehicle model year and engine configuration before ordering.

Package Includes

• OAO High Performance Downpipe

• Installation Hardware Kit

• Protective Packaging

Installation

Direct bolt-on installation utilizing factory mounting locations.

No cutting or welding required.

Professional installation is highly recommended.

ECU tuning is recommended after installation to maximize performance and help prevent potential check engine lights.

Important Notes

Available in Catless or High-Flow Sport Catalytic configurations.

This product is intended for off-road or motorsport use where permitted by local regulations.

Please verify local emissions requirements before purchasing or installing this product.

Why Choose OAO Performance

OAO specializes in premium performance exhaust systems for BMW, Mercedes-AMG, Audi RS, Porsche, Nissan GT-R, Ferrari, Lamborghini, Aston Martin, and other world-renowned performance vehicles.

Every OAO exhaust component is designed using precision engineering, premium materials, and extensive fitment validation to deliver OEM-quality installation, exceptional durability, and an unmistakable performance driving experience.

Upgrade your BMW N55-powered 535i, 640i, X5, or X6 with the OAO High Performance Downpipe and experience faster turbo response, improved exhaust flow, and the signature performance sound that defines OAO.