Patented, hands-free, on-board diesel smoke emissions control for fire trucks ambulances and school buses. Only aftermarket retrofit listed California Air Resources Board for all makes, models, years of engines. Leaves No Smoke behind. Quality dealers coast-to-coast
Donaldson Company is a vertically integrated filtration company engaged in the production and marketing of air filters used in a variety of industry sectors, including commercial/industrial, aerospace, chemical, alternative energy and pharmaceuticals.