Performance from the bottle to the throttle! The No Toil Premium Dual Stage Air Filter is great for all motorcycle riding conditions with quality to provide riders with protection for worry-free riding. The world's best two-stage foam air filter! No Toil Premium Dual Stage Air Filters are constructed out of dual-stage foam - bonded with the highest quality glue - with two different pore sizes to trap even the smallest dust particles, keeping your intake system clean. The Premium Dual Stage Air Filters have been flame laminated between the two stages; this procedure heat bonds the two stages together to provide unrestricted air flow. Each one is hand made to stand up to the roughest and toughest of any style of riding or terrain. No Toil air filters are the same size as your O.E.M. size to ensure the best fit on your motorcycle.