aFe MagnumFORCE Stage-2 Cold Air Intake System

2008–2012 BMW M3 (E9X) V8-4.0L

Part #: 51-31662

Overview

The aFe MagnumFORCE Stage-2 Cold Air Intake System is a high-performance upgrade designed specifically for the BMW M3 (E9X) with the 4.0L V8 engine. Engineered to enhance your vehicle's airflow, this intake system helps unlock additional power and torque while improving throttle response and engine sound. Whether you're a spirited driver or a performance enthusiast, this intake provides a noticeable upgrade over the factory setup, delivering better airflow, reduced intake temperatures, and a more aggressive engine note.

Designed for ease of installation, the system features a durable, powder-coated heat shield that requires no cutting or drilling, making it a straightforward upgrade for your BMW. The system's sleek styling and high-quality construction ensure both performance and durability, giving your engine bay a clean, performance-oriented look.

Key Features

The aFe MagnumFORCE Stage-2 Cold Air Intake System incorporates several advanced features to maximize performance and reliability:

• Easy-to-install, one-piece 16-gauge powder-coated heat shield that blocks engine bay heat while directing cold air into the filter.
• Stylish powder-coated steel or brushed aluminum cover adds a refined look and helps contain intake noise for a quieter operation.
• Precision-designed molded plastic intake tube maximizes airflow volume and velocity, promoting better engine breathing and power gains.
• 360-degree flow design ensures smooth, unrestricted airflow from the filter to the engine, reducing turbulence and pressure drops.
• High-flow, washable, and reusable Pro DRY S filter provides maximum convenience and performance, with a limited lifetime warranty.
• Uses a high-performance, oil-free filter media that simplifies maintenance and ensures consistent airflow over time.
• Constructed from durable materials to withstand under-hood conditions and maintain optimal performance for years to come.

Filter Options

The included Pro DRY S filter features a multi-layer, oil-free media designed for maximum airflow and filtration efficiency. Its washable and reusable design allows for easy maintenance, making it ideal for daily driving and spirited use. The filter's high flow capacity supports increased horsepower and torque, while its low maintenance requirements make it a convenient upgrade.

Construction & Design

The intake system's housing is crafted from high-quality steel with a durable powder-coated finish, providing excellent heat resistance and corrosion protection. The molded plastic intake tube is engineered for optimal airflow dynamics, reducing turbulence and enhancing throttle response. The system's design emphasizes a seamless, leak-free fitment with factory mounting points, ensuring a hassle-free installation process. The combination of heat shielding and high-flow components helps keep intake temperatures low, supporting consistent power delivery and engine efficiency.

Performance & Sound

By replacing the restrictive factory intake with the aFe MagnumFORCE Stage-2 system, you'll experience improved airflow that supports increased horsepower and torque. The high-flow filter and optimized intake tube work together to enhance throttle response and engine sound, giving your BMW a more aggressive and sporty tone. While specific dyno numbers are not provided, users typically notice a more responsive throttle and a slight increase in engine growl under acceleration.

Installation & Fitment

The system is designed as a bolt-on upgrade that requires no cutting, drilling, or tuning. The included hardware and detailed instructions make installation straightforward, even for enthusiasts with basic mechanical skills. The system mounts directly to factory locations, ensuring a secure fit and reliable performance. No additional modifications are necessary, allowing you to enjoy your upgraded intake quickly and easily.

What's Included

• Complete intake system with high-flow Pro DRY S filter
• Powder-coated heat shield with mounting hardware
• Intake tube and cover
• All necessary clamps and hardware
• Installation instructions

Ideal For

• BMW M3 (E9X) owners seeking increased horsepower and improved throttle response
• Performance enthusiasts looking for a high-quality, easy-to-install intake upgrade
• Daily drivers and weekend warriors who want a reliable, durable intake system with a performance edge

Emissions Note

This product is designed to be 50-state legal when used with the included filter and components. It is intended for street use and complies with applicable emissions regulations, providing a legal upgrade for your BMW M3 (E9X).