The PlymoVent vertical stack rail (VSR) system is designed for vehicles with overhead exhaust stacks. Exhaust emmissions are discharged into the rail profile, which is under suction. The entire rail profile is suspended by a trolley system allowing lateral movement of the rail to align itself with the position of the overhead exhaust tailpipe. The most common application for PlymoVent VSR systems are ARFF Crash Rescue facilities like JFK International Airport, or emergency service vehicles with overhead exhaust tailpipes. Some of the features of the VSR include the self aligning trolley system for moving vehicle integration. Automatic start and release from the vehicle tailpipe. Solid one piece construction rail profile offers strength and durability. High temperature Teflon coated sealing lips for reduced friction. No human interaction required for connection.