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Flat Rate Shipping On All Products* - Sale Ends 6/30 @ Midnight
Flat Rate Shipping On All Products - Sale Ends 6/30 @ Midnight

Customer Reviews

Based on 3 reviews
51 Gallon RDS Tank $ Toolbox

I received a good price from Elite Truck. I dealt with Harrison and he was awesome. The shipping was fast and without problems. I later found that i was missing the three mounting bolts and accompaning springs. I contacted Harrison directly via phone and he shipped my missing parts the same day. Great service and available by phone, and in the USA.

ray hunsberger
Great aux tank and super easy install

Great aux tank

RDS 51 Gallon Auxiliary Tank & Toolbox Combo Black Aluminum 50X20X19 Model # 72746PC

by RDS
Original price $1,793.99
Original price $1,793.99 - Original price $1,793.99
Original price $1,793.99
Current price $1,524.95
$1,524.95 - $1,524.95
Current price $1,524.95

RDS 51 Gallon Auxiliary Tank & Toolbox Combo Black Aluminum 50X20X19 Model # 72746PC

The RDS auxiliary fuel tank is designed to feed the main fuel tank of your truck to increase driving range. Long distance drivers all over the world love the RDS auxiliary tank because it allows you to travel further with less stops, save money by purchasing fuel where it is cheaper, and avoid having to navigate a large load into a tight gas station.

The RDS auxiliary fuel tank will mount securely in the back of your truck and then can be connected to your factory fuel system using the RDS gravity feed diesel kit (Not Included). This tank comes with a tool box on top for storage of tools and supplies.

This auxiliary fuel tank comes with a lockable fuel cap, drain fitting, withdraw fitting, safety vent, sight gauge, and internal baffles to reduce sloshing. All RDS tanks meet DOT standards and are proudly made in the USA.

Elite Truck Boxes is well known for being one of the best places to purchase an auxiliary fuel tank simply because we offer the best prices and we can get the tank shipped to you without it being damaged.  

It is the user’s responsibility to comply with local, state and federal requirements pertaining to safe transportation, loading and discharging of tank contents.


  • Heavy duty mounting tabs allows the tank to be securely mounted to your truck
  • 100% pressure tested by the manufacturer for safety
  • Fully welded seams make for a very strong design and eliminate the chance of a leak
  • Rust-resistant aluminum construction will not rust or corrode 
  • Sizable toolbox with heavy duty stainless latches for storage on top of tank


Material: Aluminum
Finish: Black
Gallons: 51 
Length: 50" 
Width: 20" 
Height: 19" 
Toolbox Length: 44" 
Toolbox Width: 20" 
Toolbox Height: 6.25"