DNA Performance Race Air Filter – KTM Duke 125 2017-22. DNA Performance Race Air Filter – KTM Duke 125 DNA Performance Air Filters are designed to increase horsepower and acceleration whilst 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. A specially made Laser cut supporting frame is embedded in the DNA filter. The filtering efficiency is extremely high at 98-99% filtering efficiency (ISO 5011), with 4 layers of DNA Cotton. The flow of this DNA filter is 40.94 % more than the KTM stock foam filter! This DNA filter is designed as a High flow filter for Race use. DNA Performance Race Air Filter. DNA Performance Air Filters are designed to increase horsepower and acceleration whilst providing excellent filtration. No additional information at this time. You might also like. IXIL Race Xtrem Carbon Full System Yamaha MT-09 / SP 2021-23. IXIL Black Hyperlow Full System Yamaha MT-09 / SP 2021-23. IXIL Black Hyperlow Full System Yamaha XSR 900 2022-23. IXIL Black Full System Low mount – Honda Monkey 125 2018-23.