Not sure why the Tundra people are spending $2,600 on a larger fuel tank. TransferFlow makes one of the best tanks that replace your existing midship tank and they are only $
1,200 - replaces factor tank so you keep your bed free. If you are mechanically inclined, you can do these yourself - well with a little help because the steel tank is heavy. 46 gallon capacity. Adds double the distance between fill ups when towing as long as you have sufficient capacity for the trailer because it does up your truck weight and reduce your payload and tow capacity by about 250 pounds with tank weight and additional fuel capacity.
https://www.transferflow.com/shop/pr...5?p=1&c=10&s=p-