Performance Air Intake System

The K&N 57i Series Generation II performance air intake system is engineered to boost your BMW's performance by increasing airflow to the engine. This intake system pairs a roto-molded HDPE tube with an oversized, conical oiled cotton air filter. The K&N High-Flow Air Filter™ provides exceptional filtration and requires cleaning only every 100,000 miles under normal highway driving conditions. A custom heat shield is included to help insulate the intake air from the high temperatures within the engine bay, ensuring optimal performance. Designed as a direct replacement for the factory air filter and intake tube, the K&N 57-0691 typically installs in 60 minutes or less using simple hand tools. This system is compatible with 2011-2017 BMW 520i and 528i models. Some K&N intakes are not legal for sale or use on pollution-controlled motor vehicles in California; always check specific product specifications for CARB status for your vehicle. The K&N 57-0691 comes with K&N's No-Hassle Lifetime Limited Warranty.