Freedom Air Filters offers its quick install pre-filter kits for Peterbilt 386 and 579 models, Kenworth T680 and T880, and Volvo VNL trucks with a chrome option. The pre-filters can be installed in minutes using retainer clips with no drilling or gluing. Pre-filters are meant to keep out larger debris such as grain chaff, dirt and sand from getting into and clogging the air filter.