The Fleetguard Direct Flow air cleaner is designed to minimize air-flow direction changes, which Cummins Filtration says will provide up to 50 percent greater performance and longer The Fleetguard Direct Flow air cleaner is designed to minimize air-flow direction changes, which Cummins Filtration says will provide up to 50 percent greater performance and longer air-filter life in a smaller product profile than conventional designs. It was developed to meet the specific requirements of Tier 4 Cummins and other engine platforms with an integrated air intake system. An optional pre-cleaner module removes up to 95 percent of dust and dirt before it reaches the primary filter. The pleated primary filter is said to be over 99.9 percent efficient. Several media grades are available to match applications. An optional secondary filter is available for further protection. The housing is made from composite material for optimal product strength and easy filter service.