Provide your 2008-2018 Subaru WRX with a lifetime of performance and superior filtration with a Mishimoto Reusable Drop-In Air Filter! Mishimoto drop-in air filters can be washed and reused, saving you money over the life of the vehicle and providing consistent, efficient performance for extended use. Mishimoto filters feature high-quality woven cotton filter media coated with positively-charged oil that attracts dust and dirt, improving filtration of particles down to 5 microns. Stainless-steel mesh supports our filter media for long-lasting durability. These reusable drop-in air filters are backed by our Mishimoto Lifetime Warranty for a lifetime of savings and performance.