To the left is the factory ’05-‘06 tank. To the right is the much larger GenRight tank. The two valves on the top of the GenRight tank are called rollover valves. The factory tank has a rollover valve and what is called a Control Valve with Integral Fuel management. Hmmm, that’s a new one…maybe it’s not controlling fuel anymore? Anyway, note the factory tank has no fuel breather like Jeeps have had for decades. You can thank the EPA for that one, but more on that later.