OAO Valved Cat-Back Exhaust System for BMW E90 / E92 335i 3.0T N54 Twin-Turbo Inline-6 T304 Stainless Steel Performance Exhaust (2007–2013)

Unlock the Legendary N54 Performance Sound

Designed specifically for the BMW E90 Sedan and E92 Coupe 335i equipped with the iconic N54 3.0L twin-turbocharged inline-six engine, the OAO Valved Cat-Back Exhaust System is engineered to enhance exhaust flow, refine sound character, and unlock the true performance personality of the N54 platform.

Renowned for its tuning potential and aggressive turbocharged character, the N54 engine gains a deeper, more responsive, and more engaging exhaust note with the OAO system while maintaining daily drivability when needed.

Constructed from premium T304 stainless steel and precision TIG welded throughout, this system delivers durability, corrosion resistance, and OEM-level fitment for long-term performance use.

Key Features

✓ Designed for BMW E90 / E92 335i

✓ N54 3.0L Twin-Turbocharged Inline-6 Platform

✓ Premium T304 Stainless Steel Construction

✓ Electronic Valved Exhaust System

✓ High-Flow Cat-Back Design

✓ Precision TIG Welded

✓ Direct Bolt-On Installation

✓ Improved Exhaust Flow Efficiency

✓ Reduced Exhaust Backpressure

✓ Enhanced Turbocharged Sound Character

✓ Lightweight Performance Construction

✓ OEM-Level Fitment

Intelligent Valve Control System

Comfort Mode

With the valves closed, the system delivers a refined and controlled exhaust tone suitable for daily driving and highway cruising.

Perfect for:

• Daily Commuting

• Highway Driving

• Long Distance Travel

• Reduced Cabin Noise

Sport Mode

Open the valves and unleash the full character of the legendary N54 twin-turbo engine.

Benefits include:

• Louder Exhaust Output

• Deeper Turbocharged Tone

• Enhanced Spool and Bypass Acoustics

• Sharper Acceleration Sound

• Stronger Downshift Presence

• More Engaging Driving Experience

Performance Benefits

The OAO Cat-Back Exhaust System is engineered to improve exhaust efficiency while enhancing driving dynamics.

Potential benefits may include:

• Improved Exhaust Flow

• Reduced Backpressure

• Sharper Throttle Response

• Enhanced Turbo Spool Character

• Improved Engine Breathing Efficiency

• Increased Driving Engagement

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

Sound Characteristics

The OAO E9X 335i exhaust system is tuned to highlight the unique character of the N54 twin-turbo engine.

Drivers may experience:

• Deep and Refined Idle Tone

• Strong Mid-Range Turbo Presence

• Enhanced Blow-Off and Spool Acoustics

• Aggressive High-RPM Sound

• Classic N54 Turbo Character

• Balanced Street and Performance Tone

Designed to deliver a more emotional and engaging driving experience without excessive cabin drone.

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

• Lightweight Performance Design

• High Structural Strength

Each system is precision TIG welded and thoroughly inspected to ensure consistent quality and fitment.

Vehicle Fitment

Compatible with:

• BMW 335i E90 Sedan

• BMW 335i E92 Coupe

• BMW 335i E93 Convertible

Engine Platform

• N54 3.0L Twin-Turbocharged Inline-6

Model Years

• 2007

• 2008

• 2009

• 2010

• 2011

• 2012

• 2013

Please verify your vehicle configuration and exhaust setup before ordering.

Package Includes

• OAO Valved Cat-Back Exhaust System

• Electronic Valve Control Module

• Remote Controllers

• Installation Hardware Kit

• Protective Packaging

Installation

Direct bolt-on design utilizing factory mounting points.

Professional installation is strongly recommended for optimal fitment and performance.

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 valved cat-back systems, mid-pipes, and downpipes to titanium exhaust solutions and OEM/ODM manufacturing, every OAO product is engineered to deliver precision fitment, durability, and a truly engaging driving experience.

Upgrade your E90/E92 335i with sharper turbo response, deeper exhaust tone, and the unmistakable character of the legendary N54 platform.