OAO High Performance Downpipes for BMW F90 M5 S63 4.4T Twin-Turbo V8 T304 Stainless Steel Exhaust System

Unlock the Full Potential of the BMW M5 Super Sedan

Designed specifically for the BMW F90 M5 equipped with the legendary S63 4.4L twin-turbocharged V8 engine, the OAO High Performance Downpipes are engineered to maximize exhaust flow, reduce restriction, and unleash the full aggressive character of BMW M performance engineering.

By optimizing exhaust gas evacuation directly after the turbochargers, this system enhances turbo efficiency, sharpens throttle response, and delivers a more powerful and emotionally engaging driving experience.

Constructed from premium T304 stainless steel and precision TIG welded throughout, the OAO downpipes ensure exceptional durability, heat resistance, and OEM-level fitment for high-performance street and track use.

Key Features

✓ Designed for BMW F90 M5

✓ S63 4.4L Twin-Turbocharged V8 Platform

✓ Premium T304 Stainless Steel Construction

✓ High-Flow Performance Downpipe Design (Left & Right Set)

✓ Precision TIG Welded

✓ Mandrel-Bent Tubing Structure

✓ Improved Exhaust Gas Flow Efficiency

✓ Reduced Exhaust Backpressure

✓ Enhanced Turbocharger Response

✓ Sharper Throttle Reaction

✓ More Aggressive V8 Exhaust Character

✓ OEM-Level Fitment

Why Upgrade Your Downpipes?

The factory downpipes are designed to meet strict emissions regulations, noise control standards, and long-term durability requirements, which limits the full performance and sound potential of the S63 engine.

The OAO High Performance Downpipes are developed for enthusiasts seeking sharper response, improved airflow, and a more aggressive super sedan 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 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 raw performance potential of BMW’s S63 twin-turbo V8 platform.

Sound Characteristics

The OAO F90 M5 downpipes dramatically enhance the signature BMW M V8 sound with a deeper, louder, and more aggressive tone.

Drivers may experience:

• Deep and Powerful V8 Idle Tone

• Strong Turbocharged Presence

• Enhanced Acceleration Acoustics

• More Aggressive High-RPM Sound

• Sharper Overrun Character

• Increased Exhaust Volume and Clarity

Sound output will vary depending on full exhaust configuration and catalyst selection.

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:

• BMW M5 (F90)

• BMW M5 Competition (F90)

Engine Platform

• S63 4.4L Twin-Turbocharged V8

Model Years

• 2018

• 2019

• 2020

• 2021

• 2022

• 2023

• 2024+

• 2025+

• 2026+

Please verify your vehicle configuration and exhaust setup before ordering.

Package Includes

• OAO High Performance Downpipes (Left & Right Set)

• 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 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 F90 M5 with sharper response, improved exhaust flow, and the unmistakable performance character of OAO Performance.