Pipercross Performance Air Filter - E36, E46, E39, Z3

Stock air filter upgrade for BMW E36, E46, E39, Z3. This part number replaces BMW part number 13721730946.

This high-performance air filter replaces the original in your stock air box, offering higher airflow for better performance and is a reusable and washable filter media (unlike the original paper filter). Higher flow rates mean more oxygen for the engine to burn. The stock ECU will adapt to the new, higher volume of air, creating more power with just a simple filter change. Because it's designed for your original air box the engine bay retains a factory appearance.

Pipercross uses a super efficient filter with graduated foam filtration media. A more porous outer layer is followed by progressively denser, tighter foam layers that each capture and filter out particulates like dust, dirt, and other airborne debris. This approach allows Pipercross to increase airflow by 30-40%, while screening for dirt and dust particles BETTER than a traditional accordion-shaped paper filter.

Washable and reusable, unlike stock paper filters. Once a year, remove the filter and shake out any loose debris. Optionally, you can rinse the filter with warm water and air dry. With every third oil change or 15,000 miles, soak the filter with Pipercross cleaner, rinse thoroughly, and air dry. Invest in the cleaning and maintenance of your filter and it will reward you with better performance for years to come!

Pipercross is part of the FCL family of filter specialists who are at the forefront of filter engineering. FCL (Filtration Control Ltd) has over 40 years of filter design, engineering, and sales for all forms of filtration needs - automotive, rail, marine, HVAC, and industrial. They are a global company with over one million filters sold per year in over 60 countries.

Lifetime Warranty! All Pipercross air filters have a lifetime warranty, including replacement filters!