McAllen, TX diesel shops & aux fuel tanks

Unless you only travel a couple hundred miles/day, you'll love the features of an auxiliary tank. I love the fact I stop when I want to stop, not when the truck demands it.

I have an RDS gravity feed 45 gallon auxiliary tank in the bed of my truck and love it!

Transfer Flow are metal and Titan are a poly material in their replacement tanks. Titan are bigger for close to the same price. Google transfer flow and go to their list of installers.
Titan has several dealers in Mcallen.
titan dealers
I like the extra gallons of the Titan but I don't want it to hang below my skid plate. Have to do more research.
Good luck.
Aux. is different than replacement so make sure you know what you are looking for.