MagneGrip Diesel Exhaust Venting Systems capture toxic exhaust emissions at the exhaust stack and vents them outside. Can be installed for one to 100 vehicles. MagneGrip systems capture hazardous exhaust gases and particulates at their source and eliminate them from your facility, safely and efficiently. No system is more effective than MagneGrip. Guaranteed. With the system properly connected, persons inside are never exposed to cancer-causing diesel exhaust emissions.