This filter features DNA®’s advanced FCd (Full Contour design). To install this DNA Air filter follow the installation instructions included in the workshop manual. A perfect airtight sealing and trouble free filter installation for the user is guaranteed by using a high quality EVA seal, which isprecisely cut and factory installed (glued). 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 +25.71% more than the stock filter! DNA air filter flow: 210.80 CFM (Cubic feet per minute) @1,5"H2O corrected @ 25degrees Celsius. ΥΑΜΑΗΑ stock filter’s flow: 167.70 CFM (Cubic feet per minute) @1,5"H2O corrected @ 25degrees Celsius. This DNA® filter is designed as a High Flow Air filter for:‘Road & Race use’