Fuel Tanks, Cells & Replacement Tanks

Fuel Tanks, Cells & Replacement Tanks

The fuel tank is the reservoir and foundation of your entire fuel system, and selecting the correct capacity, material, and configuration directly impacts range, safety, and system compatibility for your application. Factory replacement steel tanks restore OEM geometry and sender calibration when the original develops rust perforations or weld failures, while aluminum and fuel cell alternatives offer significant weight savings and custom capacity options for performance builds. Off-road vehicles benefit from skid-plate-protected aluminum tanks that resist rock and trail damage, while drag racing and road course builds rely on certified FIA or SFI foam-filled fuel cells that prevent catastrophic fuel spills in racing accidents. For truck and SUV owners who need extended range for towing or backcountry use, auxiliary and transfer fuel tanks increase capacity beyond factory limits without compromising the factory tank's functionality.

Popular Upgrades

Top-selling fuel tank products include Titan Fuel Tanks XL auxiliary tank systems for Ram, Ford, and GM diesel trucks, Transfer Flow auxiliary fuel tanks for mid-size and full-size pickup trucks, and ATL and RCI certified aluminum fuel cells for drag strip and road course competition use. DEF-compatible replacement tanks for late-model diesel trucks with diesel exhaust fluid systems are high-demand replacement items as original factory tanks develop rust or seam failures. Fuel Safe and Jaz Products foam-filled fuel cells in standard and custom dimensions are popular for sanctioned oval track, drag, and off-road racing applications where cell safety certification is required.

Performance and Handling

Fuel cell foam, required by most racing sanctioning bodies, suppresses slosh-induced surge and prevents post-impact fire from a ruptured cell by limiting the free volume of fuel that can flow after a breach. Anti-surge baffling inside large-capacity road course tanks performs a similar function in non-cell applications, using internal check valves and compartmentalized baffles to maintain fuel pickup coverage during hard cornering. Auxiliary tank systems that draw from a secondary tank and transfer fuel to the main tank on demand use electric transfer pumps and float-controlled solenoids to maintain main tank level automatically during long-distance runs.

How do I know if my factory fuel tank needs replacement or just repair?

External rust on the tank bottom is normal cosmetically but becomes a replacement trigger when rust pitting has thinned the steel wall enough to allow seepage, detectable by a faint fuel smell after a full fill. Internal rust from condensation contamination causes the fuel filter and pump strainer to clog with sediment, and if flushing the tank does not eliminate the contamination, replacement is more cost-effective than repeated filter and pump failures. Weld seam failures and impact damage from road debris are immediate replacement triggers since these defects cannot be reliably sealed without professional welding that may not adhere properly to rust-contaminated steel.

What is the difference between an auxiliary tank and a transfer tank for a diesel truck?

An auxiliary fuel tank permanently mounts in the truck bed and connects to the factory fuel system via a transfer pump that automatically moves fuel to the main tank, allowing both tanks to be drawn from in normal driving. A transfer tank, often called a service or utility tank, is a standalone storage vessel used to refuel equipment in the field and is not connected to the truck's fuel system. Auxiliary systems from Titan Fuel Tanks and Transfer Flow are DOT-certified for permanent installation and road use, while transfer tanks are used for stationary storage and dispensing only.

Why These Parts Fit Right

Every fuel tank in this collection is listed with compatible year, make, model, and engine to ensure correct dimensional fit and sender compatibility with your factory gauge. Capacity ratings, material specifications, and mounting hardware details are listed for each product. Orders ship from US warehouses with fast delivery to get your fuel system back in service.

Complete your build with high-flow air intake systems, improve your exhaust with performance exhaust systems, and support your truck's load rating with heavy-duty suspension upgrades.