The RW with the 12 ft hauler section has it. The RW 305 doesn't. I had to install my own. Maybe the newer ones have it, but it wasn't an option on mine. That would be fuel tanks. I think the 305 has a 32 gl. fuel tank, not 100%. I used a 28 gl. fuel cell for my 2nd fuel tank, which I use for the fuel station.
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