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Mack CX Truck Diesel Fuel Tanks

Keep truckin' with a new Mack CX613 diesel fuel tank. Browse our inventory of aftermarket and custom fuel tanks in an array of sizes and styles. 4 State Trucks has the perfect fuel tank that will fit your big rig and your budget.
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  • BESTfit Aluminum Auxiliary Fuel Tank 45 Gallon- 19 X 36 Inch- Front Fill

    BESTfit Aluminum Auxiliary Fuel Tank 45 Gallon- 19 X 36 Inch- Front Fill

    BESTFIT TRUCK PARTS

    $750.99
    45 Gallon 19 X 36 Inch Aluminum Auxiliary Fuel Tank- Front Fill By BESTfitThis 19 X 36 Inch 45 Gallon BESTfit Front Fill Fuel Tank Is Manufactured To OE Specifications With The Same Materials As Used...
    09-0600045
    SKU:
    09-0600045
    Capacity:
    45 Gallons
    Position:
    Front Fill
    Diameter Options:
    19 Inch
    Truck Class:
    Universal
    Shape Options:
    Cylindrical
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Fuel Tanks
    Length Options:
    38 Inch
    Size Options:
    11 Gauge
    Type Options:
    Front Fill
    Ready To Ship:
    Yes
    $750.99
    Qty in Cart: 0
    Price:
    $750.99
    Subtotal:
  • 50 Gallon Aluminum Side Mount Reservoir With Rear Ports

    50 Gallon Aluminum Side Mount Reservoir With Rear Ports

    BUYERS PRODUCTS

    $1,328.99
    50 Gallon Reservoir W/ Rear PortsThis lightweight, corrosion-resistant aluminum reservoir features dual 2-inch NPT rear ports and internal baffles to reduce sloshing and control temperatures. It...
    09-02500057
    SKU:
    09-02500057
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Position:
    Center Fill
    Capacity:
    50 Gallons
    Product Type:
    Fuel Tanks
    Type Options:
    Center Fill
    $1,328.99
    Qty in Cart: 0
    Price:
    $1,328.99
    Subtotal:
  • 35 Gallon Aluminum Side Mount Cylindrical Reservoir- 24 X 19 Inch

    35 Gallon Aluminum Side Mount Cylindrical Reservoir- 24 X 19 Inch

    BUYERS PRODUCTS

    $1,069.99
    35 Gallon Side Mount Cylindrical ReservoirBuilt for strength and reliability, the 35 Gallon Aluminum Side Mount Cylindrical Reservoir offers a premium hydraulic fluid storage solution. Constructed...
    09-02500265
    SKU:
    09-02500265
    Capacity:
    35 Gallons
    Product Type:
    Cargo Control
    Diameter Options:
    24 Inch
    Material Options:
    Aluminum
    Shape Options:
    Cylindrical
    Length Options:
    19 Inch
    Type Options:
    Side Mount
    Make:
    Universal Items
    $1,069.99
    Qty in Cart: 0
    Price:
    $1,069.99
    Subtotal:
  • BESTfit DEF Doser Injector Kit For Cummins Replaces 043027, 2121300003, 321353

    BESTfit DEF Doser Injector Kit For Cummins Replaces 043027, 2121300003, 321353

    BESTFIT TRUCK PARTS

    $131.99
    Diesel Exhaust Fluid Doser Injector Kit By BESTfit Replaces 043027, 2121300003, 321353 Fits CumminsMaintain accurate emissions dosing with the BESTfit DEF Doser Injector Kit, replacing 043027,...
    09-06070002
    SKU:
    09-06070002
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
    Subtotal:
  • BESTfit Doser Injector Gasket For Cummins Engine Replaces 4354280, 2885890, A029Y977

    BESTfit Doser Injector Gasket For Cummins Engine Replaces 4354280, 2885890, A029Y977

    BESTFIT TRUCK PARTS

    $50.99
    Doser Injector Gasket Gasket By BESTfit Replaces 4354280, 2885890, A029Y977 Fits Cummins EngineMaintain proper injector sealing with the BESTfit Doser Injector Gaske for Cummins engines. Constructed...
    29-06070023
    SKU:
    29-06070023
    Product Type:
    Fuel Tanks
    Material Options:
    Stainless Steel
    Style Options:
    Cummins
    Make:
    Universal Items
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    Subtotal:
  • Fuel Pressure Sensor Harness

    Fuel Pressure Sensor Harness

    JML KUSTOMS

    $20.18
    Fuel Sensor HarnessThis fuel sensor harness is built with 16 AWG nylon/copper wiring and includes heat-shrink butt connectors and expandable sleeving for a sealed, corrosion-resistant installation...
    09-160300021
    SKU:
    09-160300021
    Material Options:
    Copper
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $20.18
    Qty in Cart: 0
    Price:
    $20.18
    Subtotal:
  • BESTfit DEF Doser Injector Kit Replaces 2121300001 For Cummins

    BESTfit DEF Doser Injector Kit Replaces 2121300001 For Cummins

    BESTFIT TRUCK PARTS

    $131.99
    Diesel Exhaust Fluid Doser Injector Kit By BESTfit Fits CumminsDepend on strong emissions system performance with the BESTfit DEF Doser Injector Kit, a replacement for 2121300001. Designed for...
    09-06070003
    SKU:
    09-06070003
    Position:
    Kit Full
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
    Subtotal:
  • BESTfit DEF Pump 2.2 For Cummins Replaces 098644D207, 2P0131113B, 5EL056

    BESTfit DEF Pump 2.2 For Cummins Replaces 098644D207, 2P0131113B, 5EL056

    BESTFIT TRUCK PARTS

    $1,138.99
    Diesel Exhaust Fluid Pump 2.2 By BESTfit Replaces 098644D207, 2P0131113B, 5EL056 Fits CumminsMaximize the efficiency of your emissions system with the BESTfit DEF Pump 2.2, a reliable replacement for...
    29-06070027
    SKU:
    29-06070027
    Style Options:
    Cummins
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $1,138.99
    Qty in Cart: 0
    Price:
    $1,138.99
    Subtotal:
  • BESTfit DEF Doser Injector Kit Replaces 043028, 2121300002 For Cummins

    BESTfit DEF Doser Injector Kit Replaces 043028, 2121300002 For Cummins

    BESTFIT TRUCK PARTS

    $131.99
    Diesel Exhaust Fluid Doser Injector Kit By BESTfit Replaces 043028, 2121300002 Fits CumminsKeep emissions systems performing efficiently with the BESTfit DEF Doser Injector Kit, a direct replacement...
    09-06070004
    SKU:
    09-06070004
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
    Subtotal:
  • BESTfit DEF Doser Injector Kit For Cummins Engine Replaces 2121301002

    BESTfit DEF Doser Injector Kit For Cummins Engine Replaces 2121301002

    BESTFIT TRUCK PARTS

    $131.99
    Diesel Exhuast Fluid Injector Kit By BESTfit Replaces 2121301002 Fits Cummins EngineKeep your DEF system performing reliably with the BESTfit DEF Doser Injector Kit a replacement for Cummins engines...
    29-06070022
    SKU:
    29-06070022
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
    Subtotal:
  • BESTfit DEF Pump 2.2 For Cummins Replaces 1819797, 2880158, A662102

    BESTfit DEF Pump 2.2 For Cummins Replaces 1819797, 2880158, A662102

    BESTFIT TRUCK PARTS

    $1,145.99
    Exhaust Fluid Pump 2.2 By BESTfit Replaces 1819797, 2880158, A662102 Fits CumminsOptimize your emissions system with the BESTfit DEF Pump 2.2, a dependable replacement for 1819797, 2880158, and...
    29-06070029
    SKU:
    29-06070029
    Product Type:
    Fuel Tanks
    Style Options:
    Cummins
    Make:
    Universal Items
    $1,145.99
    Qty in Cart: 0
    Price:
    $1,145.99
    Subtotal:
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Frequently Asked Questions About Mack CX Truck Diesel Fuel Tanks

Will a replacement fuel tank fit my Mack CX correctly?

Mack CX fuel tanks vary by capacity, mounting bracket configuration, and strap style depending on the model year and chassis setup. Before ordering, check the tank's dimensions, capacity, and mounting hole pattern against your truck's original tank to confirm a proper fit. If you are unsure, our team can help match a tank to your specific application.

What materials are these fuel tanks made from, and does it affect performance?

Diesel fuel tanks for the Mack CX are typically constructed from aluminum or steel. Aluminum tanks are lighter and resist corrosion well, while steel tanks tend to be more rugged but heavier and more prone to rust over time if not properly maintained. Your choice often comes down to weight considerations versus long-term durability preferences.

What finish options are available, and do I need to treat the tank after installation?

Tanks may come raw, painted, or polished depending on the manufacturer and material. Raw aluminum tanks generally do not require additional coating, though some owners choose to polish them for appearance. Steel tanks benefit from a protective coating or paint to help prevent rust, especially in areas with road salt or high moisture exposure.

What do I need to know before installing a new fuel tank?

Installation typically involves draining and disconnecting the old tank, removing the mounting straps and brackets, and transferring or replacing fuel lines, sending units, and vent fittings as needed. Make sure new gaskets and seals are used at every connection point, and always follow proper safety procedures when working with diesel fuel systems, including working in a well-ventilated area away from ignition sources.

How do I choose the right tank capacity for my truck's needs?

Fuel tank capacity affects driving range and overall vehicle weight. Common capacities for Mack CX trucks range from smaller single tanks to larger dual-tank setups used for long-haul routes. Consider your typical routes, fuel stop availability, and any weight restrictions when selecting a replacement tank size.


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