The 2011-2016 Ford F350, F450 & F550 Cab and Chassis trucks are equipped with an after-axle 40-gallon fuel tank. These OEM tanks have a failure prone coating inside the tank. Once the coating becomes unstable inside the tank, the laminate peels off and gets picked up into the fuel system. If not addressed, the containments can ruin the entire fuel system on the truck. S&B Tanks are made out of Crosslink Polyethylene. This material will not delaminate and is the SOLUTION to fixing issues with tank delamination. If you truck is not showings signs of delamination, this tank is a great way to protect fuel system. Easily secure your OEM sending unit into the S&B tank by transferring over your original Ford locking ring. This is a faster and easier way to put secure the sending unit into the S&B Tank.