TWIN AIR Air Filter - PW80 152011 Corsair-X Helmet Spoiler DF-X2 Diffuser Extension Provides smoother shifting

Provides smoother shifting

while decreasing clutch fade

The systems can also be utilized to reduce sound by a significant amount without reducing maximum power output

Requires slight modification of stock throttle housing (by removing the factory throttle stops)

TWIN AIR Air Filter - PW80 152011 Corsair-X Helmet Spoiler DF-X2 Diffuser Extension Provides smoother shiftingDual 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