We followed along as one was installed on a 2012 Ram 3500. The long-bed dualie was already on the rack at Transfer Flow's installation facilities in Chico, California. Eric Harper walked us ...

For the sake of simplicity, I'll just tell you that the installation went smoothly and that, overall, I was pleased with the Transfer Flow midship auxiliary fuel tank.

Sleek and compact in-bed auxiliary tanks come in 50-, 75-, and 100-gal. capacities and are available for 1999-2018 Ford and Ram and 2001-2018 GM short and long bed diesel trucks.

Transfer Flow has introduced a 70-gallon toolbox and fuel tank combo for 1999-2016 Ford, Ram and GM full-size diesel trucks.

Transfer Flow introduced a 50-gal. high-capacity replacement fuel tank for the 2016 Nissan Titan XD diesel truck.