Swap out the dirty factory air filter in your 2011-2016 Ford 6.7L Powerstroke with a high-quality Drop-In Air Filter. A drop-in air filter is named after the simple installation procedure as it simply drops into the factory airbox in most applications. Factory-style drop-in air filters typically feature a paper filter media, while aftermarket performance filters use an oiled cotton-gauze media, or a synthetic dry media. Shop for drop-in air-filters from manufacturers like S&B Filters, AFE, K&N Engineering, and others available at XDP. An air filter is a crucial component for your engine and its purpose is to keep harmful airborne dust and debris out of your engine.