Twin Air's original dual-stage patented design, high quality materials and superior construction deliver unbeatable performance and protection - these are the hands-down choice of more World and National Champions than all other filters combined. The air filter is the heart of your engine, so this is not the maintenance item to mess around with. If dirt works its way in, a pinhead-sized granule will gouge your cylinder, piston and rings like a bullet.
May not be street legal in all states. LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES WHICH MAY NEVER BE USED, OR REGISTERED OR LICENSED FOR USE, UPON A HIGHWAY. OUTSIDE OF CALIFORNIA, CHECK LOCAL AND STATE EMISSIONS REGULATIONS FOR COMPLIANCE.