Bought this for my&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/RDS-Fuel-Tank-Tool-Combo-60-Gallon-Model-72743/dp/B001O3FRLO/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">RDS Fuel Tank Tool Combo - 60 Gallon, Model# 72743</a>&nbsp;to install in my 2016 Ford F350.  I have the truck to pull my 41' fifth wheel.  When hauling the 16k pound trailer, the gas mileage drops to about 8 or 9 mpg, hence the auxiliary tank install.  Enough about the reasoning, lets get to the kit.