Dinan D401-0049 High Flow Drop-In Air Filter for 2020-2025 BMW X3/X4 M40i

The Dinan D401-0049 high flow drop-in replacement air filter is engineered to maximize airflow and performance for 2020-2025 BMW X3 and X4 M40i models. This performance air filter is designed as a direct replacement for the factory filter, installing quickly and easily into the stock airbox without modifications.

Key Features:

• Direct drop-in replacement for OE air filter—no modifications required
• 4-layer proprietary oiled cotton gauze construction for superior filtration efficiency
• High flow design reduces air restriction for improved engine performance and throttle response
• Washable and reusable for the life of the vehicle—never buy another air filter
• Quick and easy installation in minutes

Unlike disposable paper filters that must be replaced every 12,000-15,000 miles, the Dinan high flow air filter can be cleaned and re-oiled repeatedly, providing excellent long-term value. The advanced cotton gauze material flows significantly better than stock while maintaining exceptional filtration to protect your engine. This upgrade allows your BMW's turbocharged B58 engine to breathe more freely, maximizing power output and efficiency.