This tank hold approximately 60 gallons of fuel. The float's empty position in the S&B Tank is the same as the OEM tank. Since the bottom surface area on the S&B Tank is larger, the 60 Gallon tank with have a greater fuel reserve.
According to the Ford TSB 17-0046. If your truck has a build date prior to 3-20-17. Replace the fuel Level Sender Resistor Card Assembly with Ford part # HC3Z-9A299-N.
In-bed Auxiliary Fuel Tanks will void the Lifetime Warranty. Here's why.