K&N Engineering Performance Drop-In Air Filter

Fits 1990–1999 BMW 3 Series E36 318 and Z3 with 1.9L M42 and M44 Engines

Part #: 33-2733

Overview

The K&N Performance Drop-In Air Filter is designed to enhance the airflow to your BMW's engine, specifically fitting models equipped with the 1.9L M42 and M44 engines from 1990 to 1999. As a trusted name in performance filtration for over three decades, K&N Engineering has developed this high-flow air filter to deliver superior filtration and increased airflow compared to standard disposable filters. Whether you're a daily driver, a spirited enthusiast, or someone seeking reliable performance upgrades, this filter helps support improved throttle response, better engine breathing, and potentially increased horsepower and torque.

Built to withstand the rigors of demanding driving conditions, the K&N Drop-In Air Filter is an excellent upgrade for your BMW's intake system. Its durable construction ensures long-lasting performance, making it a smart choice for those who want to maximize their vehicle's efficiency without complicated modifications.

Key Features

The K&N Performance Drop-In Air Filter incorporates several advanced features to optimize your vehicle's airflow and filtration capabilities:

• Constructed with multiple sheets of high-flow cotton gauze, sandwiched between durable, epoxy-coated aluminum wire mesh, providing excellent filtration and airflow.
• Designed as a direct replacement for your factory air filter, ensuring a perfect fit and easy installation without the need for modifications.
• Replaces OEM filters with a washable and reusable design, allowing you to clean and re-oil the filter for continued performance over the years.
• Engineered to improve airflow to your engine, which can help support increased horsepower, torque, and overall engine efficiency.
• Manufactured with high-quality materials that withstand extreme conditions, including dust, dirt, and moisture, ensuring reliable filtration and durability.
• Backed by K&N's Million-Mile Limited Warranty, emphasizing quality and confidence in performance.
• Designed to fit seamlessly into the factory air box, maintaining the original intake system's integrity and ensuring no loss of performance or drivability.
• Optimized for street use, providing a balance of filtration efficiency and airflow for everyday driving and spirited outings.
• Proven to outperform conventional paper filters in airflow and longevity, making it a cost-effective upgrade over time.

Filter Options

This product features a high-flow cotton gauze media that is oiled during manufacturing to maximize filtration efficiency and airflow. The filter is washable and reusable, allowing for easy maintenance and long-term use. Regular cleaning and re-oiling will ensure optimal performance and filtration, making it a sustainable choice for your vehicle.

Construction & Design

The K&N Drop-In Air Filter is built with a durable, epoxy-coated aluminum wire mesh that provides structural integrity and corrosion resistance. The high-flow cotton gauze media is layered to maximize airflow while maintaining excellent filtration. Its design ensures a snug fit within the factory air box, preserving the OEM intake system's integrity. The filter's washable and reusable construction reduces waste and ongoing costs, offering a sustainable upgrade that maintains peak performance over the lifespan of your vehicle.

Installation & Fitment

The K&N Performance Drop-In Air Filter is a straightforward, bolt-in replacement that requires no special tools or modifications. Simply remove the existing factory filter from your BMW's air box and insert the K&N filter in its place. No cutting, drilling, or tuning is necessary, making it an easy upgrade for DIY enthusiasts and professionals alike. The filter's precise fit ensures a secure seal, preventing unfiltered air from entering the engine and maintaining optimal performance.

• Easy, bolt-on installation with no modifications required
• Fits OEM air box for 1990–1999 BMW 3 Series E36 318 and Z3 with 1.9L M42 and M44 engines
• Replaces factory filter directly, maintaining factory airflow and filtration standards

What's Included

• One high-flow washable and reusable K&N Performance Drop-In Air Filter
• Installation instructions

Ideal For

• BMW owners seeking to improve engine airflow and filtration
• Enthusiasts looking for a durable, long-lasting air filter upgrade
• Daily drivers and performance enthusiasts aiming for better throttle response and engine efficiency