Double Your 3rd Gen Tundra's Range Without Giving Up Your Factory Tank
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If you've towed or overlanded in a 2022 or newer Tundra, you've probably noticed the factory tank doesn't stretch as far as you'd like once you're loaded down or off the pavement. Big tires and a loaded bed eat into range fast.
Jerry cans and roof-mounted fuel cells mean carrying gas exposed and pouring it by hand at the trailhead. A replacement tank means pulling your factory tank and evap system. Neither is a great trade.
An Auxiliary Fuel Tank That Keeps Your Factory Tank
The Helivue Design 3rd Gen Tundra auxiliary fuel tank adds a second, 18 gallon tank alongside your factory tank, roughly doubling your fuel capacity.
How the Tank Fills and Transfers Fuel
It fills through your factory filler neck, and both tanks fill at the same time. You don't need a second gas cap or an extra stop at the pump. When you want the extra fuel, a programmable transfer switch with a built-in level gauge moves it into your main tank. The kit comes with a quality fuel pump, a stainless steel level sender, and all the stainless clamps, hardware, and bung you need.
Build, Specs, and Install
The tank is built from 1/8 inch (3mm) 5052 aluminum for strength and corrosion resistance, with a hammer-finish powder coat, and weighs about 25 pounds empty - about 133 pounds full. It takes the place of your spare tire, so you'll need a new home for your spare, and you'll need to change the tailpipe: either swap the rearmost section for an aftermarket turndown pipe, like the one from SXTH Element, or cut the factory pipe down. Plan on about five hours for the install, or find a shop through our installer page.
Designed, Built, and Tested in Colorado
Every tank is designed and built in Colorado, and our tanks have been beaten, bashed, landed on, and driven regularly at elevations from 5,000 to 13,000 feet without failure.
3rd Gen Tundra Auxiliary Fuel Tank FAQ
How much fuel does the auxiliary tank add?
It adds 18 gallons on top of your factory tank, roughly doubling the Tundra's fuel capacity.
Do I keep my factory fuel tank?
Yes. This is an auxiliary tank, not a replacement. Your factory tank and evap system stay in place.
Do I lose my spare tire?
The tank mounts in the spare tire location, so you'll need to relocate your spare, for example to a rear bumper carrier or bed mount.
Do I need to modify my exhaust?
Yes. The rearmost tailpipe section needs to be replaced with an aftermarket turndown pipe (SXTH Element makes one) or cut down to clear the tank.
How do I fill it?
Through your factory filler neck. Both tanks fill at the same time, so there's no second gas cap.
How long does the install take?
About five hours with basic tools. Prefer a shop? See our installer list.
What does the tank weigh?
About 25 pounds empty and about 133 pounds full.
In Stock and Shipping Now
The 3rd Gen Tundra tank is in stock and shipping now. Use the vehicle finder at the top of our site to confirm fitment, or reach out with any questions.