K&N Engineering Replacement Air Filter: Mazda 323 1998 1.32005 2010 Suzuki Swift Replacement Air Filter by K&N Never Replace Your Air Filter Again. Handmade in the USA and in the United Kingdom using only the finest materials, K&N OE Replacement Air Filters are washable and reusable. Regardless of what youve heard, its almost impossible to wash your K&N Air Filter too much. Inside our testing laboratory, we have washed and re oiled one K&N Air Filter more than 100 times and it still performs up to