Installation of the filter is very easy, simply follow the information that can be found in the workshop manual, also included with product. A specially made Laser cut supporting frame is embedded in the DNA filter. The flow of this DNA filter is 23.87 % more than the stock foam filter! This DNA filter is designed as a High flow filter for road and performance use. This filter is reusable and has lifetime warranty. DNA replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple.They offer bigger air-flow, with almost 99% filtering efficiency. It's ideal for Duke 125, 250, 390 (17-18) series .