OAO High Performance Downpipes for Audi B9 RS4 / RS5 2.9T TFSI EA839 Twin-Turbo V6 T304 Stainless Steel Exhaust System

Unlock the Full Performance Potential of Audi's 2.9T Twin-Turbo V6

Designed specifically for the Audi B9 RS4 and RS5 equipped with the powerful EA839 2.9L twin-turbocharged V6 engine, the OAO High Performance Downpipes are engineered to maximize exhaust flow, reduce turbocharger backpressure, and unlock the full performance potential of Audi Sport's high-performance platform.

Replacing the restrictive factory catalytic downpipes allows exhaust gases to exit the twin turbochargers more efficiently, improving turbo response, enhancing throttle sensitivity, increasing engine efficiency, and delivering a deeper, more aggressive RS exhaust note.

Manufactured from premium T304 stainless steel with precision TIG welding, mandrel-bent tubing, and CNC-machined flanges, every OAO downpipe is built to withstand extreme temperatures while providing exceptional durability, corrosion resistance, and OEM-quality fitment.

Key Features

✓ Designed for Audi B9 RS4 / RS5

✓ EA839 2.9L Twin-Turbocharged V6 TFSI Engine

✓ High-Flow Performance Downpipes

✓ Premium T304 Stainless Steel Construction

✓ Available in Catless or High-Flow Sport Catalytic Versions

✓ Precision TIG Welded

✓ Mandrel-Bent Tubing Design

✓ CNC Precision-Machined Flanges

✓ Reduced Exhaust Backpressure

✓ Faster Turbocharger Response

✓ Improved Exhaust Flow Efficiency

✓ OEM-Level Direct Bolt-On Fitment

Why Upgrade Your RS Downpipes?

The factory downpipes are designed to meet emissions regulations and noise requirements, limiting exhaust flow immediately after the turbochargers.

The OAO High Performance Downpipes optimize exhaust gas evacuation, allowing the EA839 twin-turbo V6 to breathe more efficiently while improving overall driving performance.

Potential benefits may include:

• Faster Turbo Spool

• Reduced Exhaust Restriction

• Improved Turbocharger Efficiency

• Sharper Throttle Response

• Increased Mid-Range Torque

• Improved High-RPM Performance

• Enhanced Exhaust Flow

• Better Compatibility with ECU Performance Tuning

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

Motorsport-Inspired Engineering

Developed using advanced exhaust flow analysis and performance engineering principles, every OAO downpipe is optimized for maximum efficiency and durability.

Engineering highlights include:

• Large-Diameter High-Flow Tubing

• Smooth Exhaust Gas Transition

• Optimized Exhaust Velocity

• Reduced Flow Turbulence

• Improved Thermal Management

• Lightweight Performance Design

• Seamless Integration with Factory and Aftermarket Exhaust Systems

Designed for both daily driving and high-performance applications.

Enhanced Audi RS Sound

The EA839 2.9T twin-turbo V6 delivers impressive power and a refined RS character.

The OAO Performance Downpipes enhance the natural sound of the engine:

• Deeper Cold Start

• Stronger Turbocharger Sound

• Richer V6 Exhaust Tone

• Sharper Acceleration Acoustics

• More Aggressive Overrun Pops (ECU Calibration Dependent)

• Increased Exhaust Volume

• Enhanced High-RPM Exhaust Character

Combined with an OAO Valvetronic Exhaust System, the RS4 and RS5 deliver a more emotional and aggressive Audi Sport experience.

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 is carefully inspected before shipment to ensure perfect quality and fitment.

Vehicle Fitment

Compatible with:

Audi RS4 B9

• RS4 Avant (B9)

Audi RS5 B9

• RS5 Coupe (B9)

• RS5 Sportback (B9)

Engine Platform

• EA839 2.9L Twin-Turbocharged V6 TFSI

Model Years

• 2018

• 2019

• 2020

• 2021

• 2022

• 2023

• 2024

Please verify your vehicle model, engine code, and factory exhaust configuration before ordering.

Package Includes

• OAO High Performance Downpipes (Left & Right)

• Installation Hardware Kit

• Protective Packaging

Installation

Direct bolt-on installation using factory mounting locations.

No cutting or welding required.

Professional installation is highly recommended.

ECU tuning is recommended after installation to maximize performance and optimize engine calibration.

Important Notes

Available in Catless and 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 purchase or installation.

Why Choose OAO Performance

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

Every OAO exhaust component combines precision engineering, premium materials, and extensive vehicle testing to deliver OEM-quality fitment, outstanding durability, and exceptional performance.

Upgrade your Audi B9 RS4 or RS5 2.9T with the OAO High Performance Downpipes and experience faster turbo response, improved exhaust flow, and the unmistakable sound of Audi Sport's twin-turbo V6 performance.