K&N Engineering Replacement Air Filter

1988–1996 BMW 535 (E34), 1989 BMW 635 (E24), 1988–1996 BMW 735 (E23/E32)

Part #: 33-2573

Overview

The K&N Engineering Replacement Air Filter is designed to provide a high-performance upgrade for your BMW, specifically tailored for models from the late 1980s through the mid-1990s. Whether you're restoring a classic or seeking improved airflow and filtration for your daily driver, this filter offers a reliable solution to enhance your vehicle's intake system.

Engineered for enthusiasts who want to support increased airflow, the K&N filter helps optimize engine performance, throttle response, and overall efficiency. Its durable construction ensures long-lasting service, making it an excellent choice for those looking to maintain or improve their BMW's performance without sacrificing filtration quality.

Key Features

The K&N Replacement Air Filter incorporates advanced materials and design features to deliver superior performance and durability:

• Constructed with high-quality, washable, and reusable cotton gauze media that provides excellent filtration while maximizing airflow.
• Designed with a deep, multi-layered cotton media that captures dirt and debris effectively, protecting your engine from harmful contaminants.
• Sealed with a durable epoxy coating to prevent dirt and moisture from bypassing the filter media, ensuring consistent filtration performance.
• Precision-engineered to fit directly into the factory air box, providing a seamless upgrade without the need for modifications.
• Backed by K&N's renowned 10-year/million-mile limited warranty, emphasizing quality and longevity.
• Optimized for improved airflow compared to standard paper filters, supporting better engine breathing and potential performance gains.
• Designed for easy cleaning and re-oiling, allowing you to maintain peak performance with minimal effort.
• Suitable for street use, offering a balance of filtration, airflow, and durability for everyday driving.

Filter Options

This product features a high-flow cotton gauze media that is washable and reusable. It does not require oiling like traditional oiled filters, simplifying maintenance and reducing mess. The filter's design ensures consistent filtration and airflow, making it ideal for daily driving and spirited use alike.

Construction & Design

The K&N air filter is built with a rugged, epoxy-coated aluminum wire mesh that provides structural integrity and resistance to corrosion. The cotton gauze media is layered for maximum dirt-holding capacity while maintaining high airflow. Its deep pleats increase surface area, extending service intervals and enhancing filtration efficiency. The filter's precise fit ensures a secure seal within the factory air box, preventing unfiltered air from bypassing the media.

Installation & Fitment

The installation process is straightforward and requires no special tools or modifications. Simply remove the existing factory filter and replace it with the K&N filter, ensuring it seats properly within the air box. No cutting, drilling, or tuning is necessary, making it a hassle-free upgrade for your BMW.

• Direct replacement for the factory air filter
• No additional tuning or modifications required
• Designed for easy installation and maintenance

What's Included

• One K&N high-flow replacement air filter

Ideal For

• BMW owners seeking improved airflow and filtration
• Enthusiasts looking for a reusable, long-lasting air filter
• Daily drivers and performance enthusiasts alike