Replace the old air filter in your 2020 Chevy/GMC 3.0L Duramax with a Drop-In Air Filter. The air filter in your vehicle serves as the first line of protection against harmful airborne debris that can damage your engine. 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. 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. XDP carries drop-in air filters from manufacturers like S&B Filters, AFE, K&N Engineering, so you can find the best one to meet your vehicle's needs.