Most low-restriction air filters start with a sheet of cotton gauze, almost identical to the stuff used to dress wounds. We can all agree that cuts and high-performance engines have very different needs. So why is there a bandage in your engine?Most "performance" filter companies (names withheld to protect the guilty) use gauze to achieve low air restriction. We use a patent-pending filter media that was designed specifically for engine intake filtration. All of our filter and intake systems are engine-specific so they maximize the performance of your vehicle.