Green Filters Performance Replacement Elements simply drop into the original airbox, replacing the original restrictive paper air filter with a performance, high-flow element. No other modifications, parts or accessories are required.Pleated cotton and mesh gauzePre-oiled and ready to useImproves intake airflowThe pleated green cotton and mesh gauze filters have been designed to improve airflow and horsepower, offering a crisper throttle response and superior performance for improved acceleration and greater driving enjoyment. All this with the highest level of filtration, giving the ultimate protection for the engine. With improved efficiency and less restriction on the airflow, you can also see improved mpg figures, possibly giving important savings on fuel.Green panel filters are supplied pre-oiled and ready to use and can be used repeatedly. Simply clean and re-oil the element with the Green Filters service kits (available to purchase separately) for long-lasting performance gains.