Dinan D401-0046 High Flow Drop-In Replacement Air Filter for BMW M240i M340i M440i

The Dinan D401-0046 High Flow Drop-In Replacement Air Filter is engineered to maximize engine performance and efficiency for 2020-2025 BMW M240i, M340i, and M440i models. This performance air filter directly replaces your factory air filter with a less restrictive, better-flowing design that allows your turbocharged B58 engine to breathe more freely.

Key Features:

• Four layers of proprietary high-flow oiled cotton gauze material for exceptional filtration and airflow
• Washable and reusable for the life of the engine, eliminating the need for replacement filters
• Direct drop-in replacement for stock air filter with quick and easy installation
• Less restrictive design compared to OEM paper filter for improved throttle response and power delivery
• Premium construction designed to meet Dinan's rigorous performance and quality standards

Unlike disposable paper filters that must be replaced every 15,000-30,000 miles, the Dinan high-flow air filter can be cleaned and re-oiled using a proper cleaning kit, making it both an environmentally friendly and cost-effective upgrade. This filter is designed to work with both stock and modified BMW engines, providing enhanced airflow without sacrificing filtration efficiency.