33-2144 High-Flow Air Filter is expertly crafted for drivers who pursue outstanding engine performance, optimal fuel efficiency, and eco-friendliness. It adopts a multi-layer high-performance cotton filter medium paired with a professional-grade maintenance oil coating, capable of trapping over 99% of particles as tiny as 0.3 microns. This filter not only offers reliable defense against engine abrasion but also drastically lowers intake resistance, improving airflow efficiency by up to 50%. As a result, it enhances engine horsepower and ensures more sensitive throttle response.