aFe MagnumFORCE Stage-2Si Cold Air Intake

Part #: 51-81012-B

Overview

The aFe MagnumFORCE Stage-2Si Cold Air Intake is a high-performance upgrade designed for enthusiasts seeking increased power and improved airflow in their BMW 3-Series E9X models from 2006 to 2012. This intake system features a fully enclosed, heat-shielding molded plastic housing that helps protect the intake air from under-hood heat, ensuring cooler, denser air reaches the engine for optimal combustion. Equipped with a washable and reusable conical air filter, it enhances airflow while reducing maintenance costs. The system's auxiliary inlet duct further supports improved airflow, contributing to better throttle response and overall engine efficiency. Its sleek black vacuum-formed plastic cover offers easy access for filter servicing and adds a refined aesthetic to your engine bay. Designed to support your vehicle’s performance goals, this intake helps unlock additional horsepower and torque, making it an excellent choice for drivers looking to enhance their driving experience without compromising reliability or durability.

Key Features

This intake system combines innovative design with practical functionality, offering several key benefits:

• High-flow, washable conical air filter for sustained performance and easy maintenance
• Fully enclosed heat-shielding housing to minimize intake air temperature
• Auxiliary inlet duct for improved airflow and throttle response
• Durable, black molded plastic construction for long-lasting use
• Enhanced airflow outflow by 56% over factory intake
• Supports increased horsepower and torque output
• Easy filter access with a stylish, service-friendly cover

Construction & Design

The intake features a molded plastic housing designed to withstand engine bay conditions while effectively shielding the filter from heat sources. The washable conical filter is constructed from high-quality materials to ensure durability and consistent airflow. The auxiliary inlet duct is engineered to optimize air intake paths, supporting better engine breathing and response.

Driving Feel & Feedback

Installing this intake system can improve throttle response and engine sound, providing a more engaging driving experience. The increased airflow supports smoother acceleration and a more responsive feel, especially during spirited driving or performance-oriented maneuvers.

Installation & Fitment

The system is designed for straightforward installation compatible with BMW 3-Series E9X models from 2006 to 2012. Proper fitment should be verified against the vehicle’s specifications and the part number provided.

What’s Included

The package includes the fully enclosed heat-shielding intake housing, washable conical air filter, auxiliary inlet duct, and all necessary hardware for installation.