Thanks to their patented conception & their high quality raw materials, Twin Air filters warrant the best performance & protection for your motorcycle. That’s why EO manufacturers & the best riders of the world choose Twin Air. * Coarse open-pore foam catches airborne dirt, grime & sand * Fine open-pore inner foam acts as a second filter to trap the smallest particles while ensuring maximum air passage * Exclusively developed adhesive ensures glue seams will not break down * Thick, flat foam, greaseless sealing ring ensures maximum contact with your airbox, while acting as a breathable gasket for increased air passage * Fused outer & inner elements prevent dirt & grime from being lodged between layers, unlike Twin Air, this can be a problem with inferior two-piece designs. * Trapped particles can restrict airflow. & if dirt works its way into your engine, a pinhead-sized granule will gouge your cylinder, piston & rings like a bullet Article: TWIN AIR Pre-Oiled Air F...