aFe Magnum FORCE Stage-2Si Cold Air Intake System

2006–2012 BMW 3 Series E9x L6 3.0L Non-Turbo

Part #: 54-81012-B

Overview

The aFe Magnum FORCE Stage-2Si Cold Air Intake System is designed to enhance the performance and efficiency of your BMW 3 Series E9x with a 3.0L naturally aspirated engine. Crafted for enthusiasts who seek improved throttle response, increased horsepower, and a more aggressive engine sound, this intake system offers a significant upgrade over the factory setup. Whether you're a daily driver looking for better fuel economy or a spirited driver aiming for more power on the street, this intake system delivers reliable performance and a refined driving experience.

By replacing the restrictive stock air box with a high-quality, cross-linked polypropylene rotomolded plastic air box, the Stage-2Si system ensures a consistent supply of cold, outside air directly to your engine. The built-in ram scoop design pulls in fresh air from outside the engine bay, helping to reduce intake air temperatures and improve overall engine efficiency. The sealed, molded plastic or aluminum cover provides a factory-style appearance while minimizing intake noise, resulting in a quieter, more refined engine bay sound without sacrificing performance.

Key Features

The aFe Magnum FORCE Stage-2Si intake system incorporates advanced engineering and premium materials to maximize airflow and durability. Key features include:

• Sealed, molded plastic or aluminum cover that provides a factory-style appearance with reduced intake noise compared to open systems.
• Cross-linked polypropylene rotomolded plastic air box that replaces the restrictive stock air box, ensuring a steady flow of cold, fresh outside air.
• Built-in ram scoop design that forces outside air into the intake, helping to lower intake temperatures and support increased engine efficiency.
• Mandrel-bent aluminum or high-quality plastic intake tube engineered for smooth, consistent airflow and optimal throttle response.
• Precision-designed components that are TIG-welded and CNC-machined for durability and perfect fitment.
• High-flow Pro 5R filter that offers excellent filtration and airflow, supporting performance gains without sacrificing engine protection.
• Easy bolt-on installation with no cutting or drilling required, making it suitable for DIY enthusiasts and professional installers alike.
• Designed specifically for the BMW 3 Series E9x models with naturally aspirated 3.0L engines, ensuring perfect fitment and compatibility.

Construction & Design

The intake system features a robust, cross-linked polypropylene rotomolded plastic air box that withstands engine bay heat and provides long-lasting durability. The sealed cover design helps shield the filter from engine heat, maintaining cooler intake air temperatures for improved performance. The intake tube is mandrel-bent for optimal airflow and minimal turbulence, ensuring consistent power delivery across the RPM range. All components are TIG-welded and CNC-machined for precision fit and finish, reflecting aFe's commitment to quality and performance.

Performance & Sound

Designed to improve airflow compared to the factory intake, the aFe Magnum FORCE Stage-2Si system helps support increased horsepower and torque. While specific dyno numbers are not provided, users typically experience noticeable throttle response improvements and a more aggressive engine sound. The system's design reduces intake noise while enhancing the overall auditory experience, giving your BMW a sportier, more refined sound under acceleration.

Installation & Fitment

The installation process is straightforward and bolt-on, requiring no cutting, drilling, or tuning. The system mounts directly to the factory intake points, utilizing existing hardware and OEM mounting locations. With detailed instructions included, even DIY enthusiasts can complete the upgrade in under an hour. The sealed design ensures a secure fit that maintains optimal performance and reliability over time.

• Complete intake system with high-flow filter, intake tube, air box, and all necessary hardware
• Designed specifically for 2006–2012 BMW 3 Series E9x L6 3.0L Non-Turbo models
• No modifications or tuning required for optimal performance

What's Included

• Sealed, molded plastic or aluminum air box with factory-style appearance
• High-flow Pro 5R filter
• Mandrel-bent intake tube
• All necessary clamps, hardware, and installation instructions

Ideal For

• BMW enthusiasts seeking to improve engine response and power
• Street drivers looking for a quieter, more refined intake sound
• Performance-minded owners aiming to optimize their vehicle's airflow and efficiency

Emissions Note

This product is designed to be 50-state legal when installed on the specified vehicle. Please verify local regulations before installation. For off-road or race use only, not legal for street use in some areas.