Air filter (Part DBA5292), a heavy duty engine primary air intake filter designed to protect diesel and gas engines by removing dust, dirt, and other airborne contaminants before they enter the engine’s combustion system. It's mounted in the air cleaner housing of the engine’s intake system. Ambient air is drawn in through this filter before it continues through the turbocharger or intake manifold. Without effective filtration, abrasive particles can damage pistons, rings, cylinder walls, and turbocharger components.