K & N Race-Spec Air Filter -'09-'14 YAMAHA R1 YA-1009R

Race-Spec Air Filter - R1
Fewer pleats than standard K&N air filters opens up the intake tract, Designed to increase power on modified sportbikes, Fuel-management modifications may be necessary, Two-ply cotton race filter media, Purpose-built for racing, Designed for Closed Course and Competition use, Made in the U.S.A. for over 50 years