The part doesn't work. the Key will not lock. As soon as the great people saw this, they jumped on it to get it straightened out. We received a new part at no cost to us and it works!! We apologize for the one star, just really didn't know how else to get talk to someone. Transfer Flow has always taken care of us.

Awesome product, great quality and very easy to use I own two of them and would definitely buy again install is pretty simple if you’re somewhat handy the only thing I didn’t like was how I had to update the system with kind of annoying, but not too difficult

This is my 2nd. Tank for our work trucks. Game changer as far as we used to fill up daily. Now it's so nice to just dump in the truck and know that you got gas to do what you need to do now we're filling up about once a week. Easy to install just love the whole thing very solid.

Great customer service! Spoke with Ethan regarding some difficulties I was having with my system and he was able to get it sorted out quickly and efficiently!

Easy to install and modify to fit any aux pump you have!

Product in stock, shipped quickly, exactly as I expected and they met my expectations. Tank and fueling system work perfectly. Happy customer!

The lead time and delivery was again outstanding!! Your continued improvements of the product is much appreciated. We have several of these 40 gallon fuel / toolboxes and they work great!

Great product.

Arrived quickly and fit easily replacing the original. Sure make towing trailer out west much more comfortable

I purchased a 40gal inbed auxiliary tank w/trax4 and put it in a 2021 Silverado 2500. High quality product that was well packaged, had good instructions, was easy to install and worked as advertised. Install took an afternoon, when drilling thru the bed be careful on driver side front corner as the hole lines up with DEF fill line. Ran the electrical wire along frame rail thru drain plug in driverside floor board and mounted the switch next to parking brake. Behind the dash is easily accessed after uncliping the fuse panel. Just finished 1200mile trip without a trailer. Trax4 kept main tank between half to 5/8 until the aux tank was empty. Operates fairly transparently. Would be nice if the app read the trucks current mpg and used that to calculate distance to empty instead of using user inputed mpg, otherwise great product that i would highly recommend.