BPro Circuit Backfire Screen Eliminator Kit PC4012-0001 ReviewbP PP Pro Circuit Backfire Screen Eliminator Kit PC4012-0001 PThe wire screen inside a 4-strokes air filter cage is non-conducive to producing horsepowerPIn the good ol days, riders cut the wire screen out of the cage to get maximum airflow to the top end, but this kit does all the work for youP