TWIN AIR POWER FLO KIT, REPLACEMENT AIR FILTER TWIN AIR 154223, KTM SX 125/150 2019,SX 250 2019,XC 250/300 2019, HUSQVARNATC 125/250 2019,TX 125 2019,TX 300 2019,TE 150/250/300/350 2019, Coarse open-pore foam catches airbourne dirt, grime and sand Fine open-pore inner foam acts as a second filter to trap the smallest particles while ensuring maximum air passage Exclusively formulated 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 and inner elements prevent dirt and grime from being lodged between layers, unlike Twin Air, this can be a problem with inferior two-piece designs. Trapped particles can restrict airflow and if dirt works it's way into your engine, a pinhead sized granule can gouge your cylinder, piston and rings � Used (oiled) Air filter. The course outer shell catches airborne dirt, grime and sand. The inner layer traps the little stuff Part No. 15-4223.TA