DNA Air Filters - Racing Air Filter for Suzuki GSXR 600 11-21 / GSXR 750 11-21This filter features DNA's advanced FCd (Full Contour design). Installation of this DNA Air filter is very easy, simply follow the installation instructions included in the SUZUKI workshop manual. The filtering efficiency is extremely high at 98 99% filtering efficiency, with 4 layers of DNA Cotton. The flow of this DNA Fcd filter is high, 32. 60% more than the Suzuki stock paper filter! DNA Fcd air filter flow: 176. 10 CFM (Cubic feet per minute)