I would look at a replacement tank unless you think you need to haul an extra 50-100 gallons of fuel at all times. The in bed tank also takes away 18-24" of usable bed space. The 50 gallon Titan tank replaces your stock tank. The initial cost might seem high but is worth it in the long haul. Also, no cutting, splicing, drilling, valves, pumping to install the Titan.
I enjoy my 65 gallon Titan tank in my CCLB DRW. Love it when it shows 999 miles to empty and take 250 miles before it starts dropping.
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