BMC Air Filters are manufactured using a proprietary molding process that yields a truly seamless part. The characteristic red rubber is very pliable and conformable to ensure an airtight seal within your air box. Low viscosity oil saturates multi-layered cotton elements to filter out particulates down to 7 microns yet overall flow is increased in comparison to OEM paper elements. Maximize the efficiency of the air entering your engine to maximize the power coming out of your engine. Keep your bike breathing and performing at its peak with BMC Air Filters!