OAO 4” Single Midpipe for BMW G80 M3 / G82 M4 / G87 M2 S58 3.0T Twin-Turbo Inline-6 T304 Stainless Steel Performance Exhaust

Unlock the True Aggression of the BMW S58 Platform

Designed specifically for the BMW G8X platform equipped with the high-performance S58 3.0L twin-turbocharged inline-six engine, the OAO 4” Single Midpipe is engineered to maximize exhaust flow, reduce restriction, and transform the overall character of the exhaust system.

By replacing the restrictive factory midsection, this system improves exhaust gas velocity, enhances turbo response, and delivers a deeper, louder, and more aggressive performance tone across the entire RPM range.

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

Key Features

✓ Designed for BMW G80 M3 / G82 M4 / G87 M2

✓ S58 3.0L Twin-Turbocharged Inline-6 Platform

✓ 4” Single High-Flow Midpipe Design

✓ Premium T304 Stainless Steel Construction

✓ Precision TIG Welded

✓ Mandrel-Bent Large-Diameter Tubing

✓ Improved Exhaust Flow Efficiency

✓ Reduced Exhaust Backpressure

✓ Enhanced Turbocharger Response

✓ More Aggressive Exhaust Sound Profile

✓ Weight Reduction vs OEM Midsection

✓ OEM-Level Fitment

Why Upgrade to a 4” Single Midpipe?

The factory midpipe is designed to balance emissions compliance, cabin comfort, and noise regulations, which limits the full performance and sound potential of the S58 engine.

The OAO 4” Single Midpipe is engineered for enthusiasts seeking a more raw, motorsport-inspired driving experience with maximum exhaust flow efficiency.

Potential benefits may include:

• Improved Exhaust Flow Capacity

• Reduced Exhaust Restriction

• Sharper Throttle Response

• Faster Turbo Spool Feel

• Increased Exhaust Volume

• More Aggressive Sound Character

Actual results may vary depending on full exhaust configuration and ECU tuning.

Performance Engineering Focus

The OAO 4” single midpipe is designed to optimize exhaust evacuation from the downpipes toward the rear exhaust system, improving flow continuity and reducing turbulence.

Benefits include:

• High-Volume Exhaust Flow Path

• Reduced Backpressure Across Midsection

• Improved Turbo Efficiency Under Load

• Enhanced High-RPM Breathing

• Better Compatibility with Valved Cat-Back Systems

Engineered to unlock the full performance potential of the BMW S58 platform.

Sound Characteristics

The OAO midpipe dramatically enhances the acoustic personality of the G8X platform.

Drivers may experience:

• Deeper and Louder Exhaust Tone

• Stronger Inline-6 Character

• Enhanced Turbocharged Acoustics

• Aggressive Cold Start Presence

• Sharper High-RPM Sound

• More Motorsport-Inspired Exhaust Note

Designed to deliver a more emotional and engaging driving experience without unnecessary artificial sound tuning.

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 system is precision TIG welded and individually inspected before shipment.

Vehicle Fitment

Compatible with:

• BMW M2 (G87)

• BMW M3 (G80)

• BMW M3 Competition (G80)

• BMW M4 (G82)

• BMW M4 Competition (G82)

Engine Platform

• S58 3.0L Twin-Turbocharged Inline-6

Model Years

• 2020

• 2021

• 2022

• 2023

• 2024

• 2025+

• 2026+

Please verify your vehicle configuration and exhaust setup before ordering.

Package Includes

• OAO 4” Single Midpipe Assembly

• 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 may be recommended depending on full exhaust configuration.

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 midpipes and downpipes 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 G8X with improved exhaust flow, sharper response, and the unmistakable performance character of OAO Performance.