Increasing air flow through your current filter assembly is as easy as replacing your top plate with one of these PCE X-Stream Air Flow Top Plates. The PCE top plates allow air to enter smoothly through the top, which helps draw more air from the sides. That means you get more airflow headed down the carburetor or throttle body and into the combustion chamber. So, if you want more airflow then you should grab up one of these PCE X-Stream air flow top plates.