K & N OE Replacement High-Flow Air Filter - BMW BM-1121

Your BMW's engine is starving for air. The OEM filter restricts airflow at higher RPMs, robbing you of available power and throttle response. The K&N BM-1121 drops into your stock airbox with zero modifications, delivering measurably better flow while maintaining factory-level filtration and reliability.

This isn't a bolt-on that demands tuning adjustments or fabrication work. The application-specific sealing bead ensures a perfect fit against your airbox, eliminating air leaks that compromise both performance and fuel economy. Pre-oiled and ready to install, you'll feel the difference immediately—sharper acceleration, cleaner throttle tip-in, and the confidence that comes from a part engineered specifically for your platform.

Unlike disposable filters, the pleated media design extends service intervals and lets you wash and reuse the element indefinitely. Over the life of your BMW, that's genuine savings paired with sustained performance gains.

• Direct OEM fit
• Application-specific sealing
• Pleated media design
• Washable and reusable
• Pre-oiled, ready install
• No fuel management needed
• Extended service intervals
• USA-engineered construction
• MPN: BM-1121