DNA Air Filters - Air Filter for Honda NC 700 S/X 12-17 - Integra 700 D 12-17 - Integra 750 13-20 - Integra D 750 18-20 NC 750 S/X 14-20 / CTX 700This air filter features DNA's advanced FCd (Full Contour design). Installation of the filter is very easy, simply follow the information that can be found in the HONDA workshop manual. The filtering efficiency is extremely high at 98 99% filtering efficiency(ISO 5011), with 4 layers of DNA Cotton. The flow of this DNA Fcd filter is high, 59. 60% more than the Honda stock paper filter! DNA Fcd air filter flow: 180. 30 CFM (Cubic feet per minute)