Replace your old and dirty air filter with a Drop-In Air Filter for your 2016-2022 Chevy 2.8L Duramax. Drop-in air filters are aptly named as they have a "drop-in" installation that allows them to fit inside of your factory air box. 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. 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.