Recognizing that space constraints under the hoods of heavy-duty, diesel-powered vehicles are causing packaging challenges for vehicle manufacturers, Donaldson developed its PowerCore filtration technology. The Donaldson two-stage PowerCore air cleaner, for example, packs twice the amount of filter media into the same space as a conventional air cleaner. The air cleaner's element uses media with Ultra-Web nanofiber technology, designed for greater sub-micron capacity and improved overall efficiency. The new air cleaner features a straight-through airflow design and modular construction, allowing it to be installed in multiple configurations to fit the space available. Estimated list price: $95 to $350.