Shop for Aftermarket Fuel Tank Accessories Freightliner Cascadia 116/126. Keep your Cascadia's fuel system running smoothly with top-quality accessories. From safety vents and mounting brackets to filters and senders, this collection has everything you need for maintenance or upgrades. Built tough for heavy-duty trucking, these parts ensure durability and performance. Whether replacing worn components or boosting efficiency, these accessories help improve fuel economy and keep your truck road-ready.