Cold Air Intake for BMW E46 323 325 328 330 (1999-2005) 2.5L 3.0L I6 Engines

Restore Throttle Response and Induction Sound on Your BMW E46 M54 & M52TU

Who It’s For: Designed specifically for BMW 3-Series (E46) owners running the legendary M54 and M52TU inline-six engine family. Whether you’re daily driving a 325i or building a 330i track car, this is for the enthusiast who wants to hear the engine breathe.

The Problem: The factory airbox on the M54 and M52TU engines was designed for one thing: silence. BMW used a restrictive plastic housing and a heavy paper filter that prioritizes sound dampening over airflow. This results in a muffled engine note and a "lazy" throttle feel, especially in the mid-to-high RPM range where these I6 engines are supposed to shine.

The Solution: We engineered this intake system to eliminate the factory bottlenecks. By replacing the baffled stock box with T304 lightweight aluminum piping and a high-velocity cone filter, we provide a direct, high-volume path for air to reach the intake manifold. This corrects the factory’s conservative airflow curve, resulting in sharper throttle response and that classic BMW straight-six growl.

Why This is the Ultimate Upgrade

• Optimized Airflow: High-flow filtration allows for up to a 10% increase in horsepower and torque by reducing vacuum loss at the throttle body.
• T304 Aluminum Construction: Unlike cheap plastic kits, our mandrel-bent T304 aluminum piping resists heat soak and won’t crack or degrade over time in a hot engine bay.
• True Bolt-On Fit: No cutting or drilling required. This kit uses factory mounting points and can be installed with basic hand tools in under 60 minutes.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• 1999-2000 BMW 323i / 323Ci (2.5L)
• 1999-2000 BMW 328i / 328Ci (2.8L)
• 2001-2005 BMW 325i / 325Ci / 325xi (2.5L)
• 2001-2005 BMW 330i / 330Ci / 330xi (3.0L)

Included Components:

Aluminum Intake Pipe, Washable High-Flow Air Filter, Steel Heat Shield (Where Applicable), Couplers, Clamps, and Installation Hardware.

The Performance Promise

Buy with confidence. Every kit is inspected for finish quality and fitment accuracy. If you’re looking to wake up your E46’s engine without spending thousands, this is the most cost-effective modification on the market. Our tech support team is comprised of real E46 owners who understand these cars inside and out.