GREEN HIGH PERFORMANCE REPLACEMENT AIR FILTER, GREEN -- Engineered to maximize air flow while trapping harmful dirt particles, resulting to increased horsepower, improved throttle response, better fuel mileage, and greater torque throughout your engine's RPM range; Uniquely designed, engineered, and manufactured using two layers of tightly-interwoven cotton fabric, cross-weaving one fine and one medium layer, creating a fabric that is thinner and stronger than other materials; Maintains the ability to trap harmful dirt particles as small as five microns; Results to better airflow without sacrificing filtration; Can be washed and reused over and over; Cleaner kit part number 2000 for this filter is sold separately.