Dinan 4in Air Filter | BMW 540i (97-03) (D403-0410)

The Dinan 97-03 BMW 540i Air Filter is a high-performance replacement component designed specifically for the Dinan Cold Air Intake system. Crafted to optimize airflow and filtration efficiency, this 4-inch air filter enhances engine breathing capabilities, resulting in improved throttle response and power output. Constructed from durable, high-quality materials, it ensures long-lasting performance and resistance to dirt and debris. Its precise fit and design help maintain optimal engine performance while providing reliable filtration, making it an essential upgrade for enthusiasts seeking to maximize their BMW 540i’s potential.

This air filter is compatible with 1997 to 2003 BMW 540i models, fitting the engine bay with a 4-inch inlet size. It is intended for use with Dinan Cold Air Intake systems, serving as a direct replacement for the stock filter. Ideal for street and performance driving, this filter supports enhanced airflow for better engine efficiency and power. Installation is straightforward, designed to bolt directly into the existing intake setup. The kit includes the filter element, ensuring a seamless upgrade for BMW owners looking to improve their vehicle’s intake performance.