K&N Engineering Air Filter for 2011-14 BMW M5/M6, 2015 M3/M4

K&N Engineering Drop-In Washable Reusable High-Flow Air Filter For 2011-14 BMW M5/M6 4.4L V8 and 2015 BMW M4/M3 3.0L I6 (2 per box). Brand: K&N Engineering — the industry leader in performance filtration. Upgrade your vehicle’s breathing with the K&N Drop-In High-Flow Air Filter. Engineered with layered, oiled cotton media, this washable and reusable filter improves airflow while effectively capturing contaminants. Designed as a direct drop-in replacement for your factory air box, installation is quick and tool-friendly. High-Flow Design: Optimized media increases airflow for improved throttle response and potential horsepower gains. Washable & Reusable: Durable construction allows cleaning and re-oiling for long service life—no frequent replacements needed. Built to Last: Engineered for the lifespan of your vehicle and backed by K&N’s 10-Year/Million Mile Limited Warranty. Exact Fit: Drop-in replacement for factory filters—maintains OEM fit, form, and function. Cost-Effective: Reusable design reduces long-term maintenance costs compared with disposable filters. Choose K&N for proven performance, superior airflow, and reliable protection. Ideal for daily drivers and performance enthusiasts alike—install today and experience the difference.