K&N是世界上最大的进气品牌制造商，旗下的进气系统可以匹配5000种内燃机，同时也是NASCAR K&N Pro组别的冠名赞助商和NHRA马力挑战赛的赞助商。
 
K&N机滤最著名的两款产品分别是一黑一白，白色的Performance Gold（HP系列）专为赛车和特殊工况设计，上榜了Pretty motors的2018最佳机滤，仅次于美孚一号M1和博世Premium（没有选测紫皇冠），当然也可用于SUV和ATV发动机。
 
The HP series is priced at about 100 yuan, known for its high strength and high flow, with very dense filter paper folds, the filtration rate reaches 99%, and the service life is 10,000 kilometers. However, over-tightening the filter with a wrench may cause the rubber gasket in it to deform, which can easily lead to oil leakage, and it is recommended to install it with some room for rotation.
 
The black Performance Silver (PS series) is the preferred filter for the civilian grade, which ranks fourth in the Gear4Wheels review, and is designed for the aftermarket, and is compatible with mineral oils to fully synthetic oils, which can be used on both mobility scooters and performance cars. PS series filter paper uses composite materials, can hold 14g of pollutants, service life between 5000-8000 kilometers, although all aspects are not particularly outstanding, but the unit price of less than 70 yuan does have a good cost performance.
 
K&N目前已经入中国市场，在各大电商平台均有销售，白色机滤价格为137元，黑色为69元，品质可信度高，值得购买。