Review on 🚀 Dodge Ram Cummins (2013-2017) Billet Aluminum Green Fuel Cap and Blue DEF Cap: Powerful Magnetic Closure - Top-Notch Auto Parts by Justin Elmore

The DEF cover is leakproof and can be covered with the OEM tether if the OEM is submerged in hot water. The GREEN diesel engine cover o-ring is a loose fit and can be replaced for a better/tighter seal and the magnet is weak. Try putting a blanket on the top of the bed if you don't want it falling to the floor. as another customer mentioned. but what the heck is only 9.99 to keep water from leaking through the fuel door seal and filling the fuel tank with H2O lol.