Green Filter 7159 Green High Performance Air Filter Flows more air without sacrificing filtration. Increases torque, horsepower, and fuel economy. Green Filters uses two layers of woven cotton. The first layer boasts a medium knit that traps bigger chunks of engine-choking filth. The second features a super-fine weave that captures particles down to 5 microns. The fabric is deeply pleated to create more dirt-snagging surface area. A stiff, green-toned stainless steel mesh protects the cotton filter medium, so Green Filters last virtually forever. The special hand-molded rubber base creates an airtight seal with your filter box keeping the muck out. Backed by a lifetime warranty. Go Green! The Green Air Filter simply traps more dirt, fits better and has greater airflow than the competition. And that translates to more power, longer engine life and better fuel economy. Washable and reusable. Made in the USA.