TWIN AIR Standard Air Filter - Yamaha 152131 Chain Guide NOTE: Features CNC full carbon

NOTE: Features CNC full carbon bracket

Forest Service standards without sacrificing performance or horsepower

R1 and others (some models could require an adapter)

Professionally developed under strict Graves Racing Services championship winning engine build guidelines

TWIN AIR Standard Air Filter - Yamaha 152131 Chain Guide NOTE: Features CNC full carbonDual bonded foam design filters out even the smallest dirt particles, while allowing more airflow than two separate layer filters (flow bench proven)Twin Air filters are slightly smaller than stock to make them easier to change and to increase dead air space around the filter for better performance Flat foam sealing ring securely seats against the airbox, even in the worst riding conditions