Stretch Underbody Fuel Cell for TJ / LJ

Name: Stretch Underbody Fuel Cell for TJ / LJ
Brand: Motobilt
SKU: MB5020
Price: 999.00 USD
Availability: InStock
Rating: 4.5 (2 reviews)

25% OFF Regular price~~$999.00~~Sale price$749.25

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Fits: Jeep Wrangler TJ / LJ

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Product details

Once a Jeep TJ or LJ build moves into stretched wheelbase territory, the factory fuel tank becomes a major obstacle. The stock tank location limits rear axle placement, interferes with suspension travel, and makes it difficult to package larger axles and link systems under the Jeep. Builders trying to stretch the wheelbase quickly run out of room unless the fuel system is addressed.

The Motobilt Stretched TJ Fuel Cell is designed to solve that problem while keeping the tank mounted underneath the vehicle. This system allows up to 6 inches of rear wheelbase stretch depending on axle choice, giving builders the room needed for proper suspension geometry and axle placement. It installs in the factory tank location, so it works whether you are stretching the Jeep or simply upgrading the fuel system for better durability and packaging.

The tank is a 14.5 gallon aluminum fuel cell built from 1/8 inch thick aluminum, CNC cut, formed, and TIG welded for strength and long-term reliability. The fill and vent tubes are CNC machined and positioned to work with factory-style routing using 1997-2002 TJ filler and vent hoses. The top of the tank includes a rollover valve and an 8AN vent fitting for proper fuel system ventilation. A machined mounting location is built into the tank to accept a 2005-2006 TJ fuel pump, secured with a steel clamping ring and hardware.

The fuel cell is protected by a fully welded 3/16 inch steel skid plate that mounts directly to the factory TJ frame. Steel hold-down straps secure the tank to the skid, creating a strong and protected system designed for rock crawling and hard trail use. This setup is built for builders who want to stretch their TJ the right way without giving up a protected underbody fuel system.

Important information

Fits Jeep Wrangler TJ / LJ 1997-2006
Designed for rear stretch applications up to 6 inches depending on axle setup
Installs in factory fuel tank location
Can be installed without stretching the wheelbase
Does not require a body lift
Works with factory exhaust routing
Uses 2005-2006 Jeep TJ fuel pump only
Pigtail adapter required for 2004 and earlier TJ models
Factory fuel filler hose and vent from 1997-2002 TJ required
2003-2006 TJ models must use earlier style filler and vent hoses
Includes rollover valve and 8AN vent fitting
Fuel pump seal not included. Uses Mopar #55366298AA
Ships raw aluminum tank and raw steel skid plate
Not compatible with Motobilt TJ or LJ Back Half Kit
Designed for off-road use only
Approximate weight 50 lbs

Product specifications

Vehicle Fitment
Jeep Wrangler TJ / LJ 1997-2006

Part Type
Rear stretch fuel cell with skid plate
Fuel Capacity
14.5 gallons

Tank Material
1/8 inch aluminum
Skid Plate Material
3/16 inch steel
Fuel Pump Compatibility
2005-2006 Jeep TJ fuel pump only
Vent System
Rollover valve and 8AN vent fitting
Included Components
Aluminum fuel cell
Steel skid plate
Steel hold-down straps
Fuel pump clamping ring and mounting hardware
Weight
50 lbs approximate
Finish
Tank raw aluminum
Skid plate bare steel
Manufactured
Made in the USA

Notes

Test fit all components before final paint or powder coat.
Use only a 2005-2006 TJ fuel pump. Earlier pumps are not compatible.
2004 and earlier TJ models require a pigtail adapter to run the newer fuel pump.
Fuel pump seal (Mopar #55366298AA) is required but not included.
Use 1997-2002 TJ fuel filler hose and vent tube for proper fitment.
When routing the vent hose from the rollover valve, loop the hose around the tank before exiting underneath the Jeep.
If running EVAP, tie the vent line into that system.
Works with a wide range of rear axles including GM 14 bolt,
Ford Sterling 10.25/10.5, Dana 60, Dana 44, and Ford 8.8.
Not compatible with Motobilt TJ or LJ Back Half Kit.
Professional installation recommended for builders performing rear stretch modifications.

Frequently asked questions

Is this a stretch fuel tank or just a replacement tank?
This is a true stretch fuel tank. It is designed to allow up to 6 inches of rear wheelbase stretch while staying in the factory tank location.

Do I have to stretch my Jeep to use this tank?
No. The tank installs in the factory location and can be used without stretching the wheelbase, but it is designed to support stretched builds.

What fuel pump does this tank use?
This tank is designed to use a 2005-2006 Jeep TJ fuel pump only. Earlier TJ fuel pumps are not compatible.

Will this work with one ton axles?
Yes. This tank is designed to work with a wide range of axle options including GM 14 bolt, Ford Sterling, Dana 60, Dana 44, and Ford 8.8 axles.

Do I need a body lift to install this tank?
No. This system is designed to install without a body lift.

Additional product details & documents

Stretched wheelbase tube fender rock crawling Jeeps have become very common on the trails. The Motobilt Stretched TJ Fuel Cell offers room to keep the tank underneath the Jeep and stretch the wheelbase in the rear up to 6” depending on the axle you are running. The Motobilt Stretch Fuel Cell with skid plate is designed for hardcore wheeling and hold up for many years to come. Like all of the Motobilt tanks they are manufactured in house utilizing state of the art laser cutting and forming technology. We stand behind our tanks and guarantee them against manufacture defect.

Designed as a heavy duty upgrade to 1997-2006 Jeep TJ or LJ, this 14.5 gallon fuel tank features an all aluminum fuel cell constructed from 1/8” thick aluminum sheet that is precision CNC laser cut & CNC press brake formed. The tank is TIG welded for superior weld strength & weld finish. The fuel fill & vent tubes are CNC machined then TIG welded to the aluminum tank body. These machined parts are positioned in the factory location & accept the factory fuel filler hose & vent tube from a 97'-02' TJ (not included). TJ's made between 03'-06' will need to purchase the older style fuel filler hose and vent.

The top side of the tank also features a roll over valve (included) . A -8 AN fitting has been added for the 2005-2006 models as they require a return line. (not included) We also include a ¾” thick machined aluminum mount location for the stock Jeep TJ fuel pump from a 2005-2006 model ONLY. This means if you have an older model TJ you will need to buy a fuel pump and pigtail to work with this fuel cell. Select the option to purchase the pigtail along with the fuel cell, or purchase here separately. The sealing of the fuel pump is done via an integrated o-ring groove (o-ring not included). The o-ring this is sized for this fuel tight seal also fits a 2007-2018 Jeep JK/JKU fuel tank.fuel pump seal (Mopar #55366298AA – NOT included). The stock TJ fuel pump is securely sandwiched by an upper steel clamping ring & eight (8) ¼” hex bolts (fasteners included).

The Motobilt TJ Stretch Fuel Cell is fully protected by a heavy duty 3/16” steel skid. The steel skid is fully MIG welded & perfectly mounts to your stock TJ frame. The aluminum fuel tank is secured to the steel skid using two steel hold down straps complete with adjustable fasteners.

The Motobilt TJ Stretch Tank does NOT require a body lift to install. Will NOT work with Motobilt TJ or LJ Back Half Kit.

Specifications

Fits 1997-2006 Jeep TJ and LJ
Works with factory exhaust.
TIG welded aluminum fuel cell
Allows for up to 6” wheelbase stretch
Works with many rear axles including GM 14 bolts, Ford Sterling 10.25/10.5, Dana 60, Dana 44, Ford 8.8, and many more.
SKID PLATE INCLUDED 3/16” thick steel.
Installs into the factory fuel tank location. Will work without stretching your wheelbase also. I.e. You do not have to stretch your wheelbase in order to install this tank.
Uses a 2005 - 2006 Jeep TJ Fuel Pump ONLY
14.5 gallon capacity
Ships raw steel and raw aluminum.
Designed for off-road use only
Does NOT require a body lift to install
Weight: 50lbs (approx.)

NOTES:

The pigtail adapter is needed for 2004 and earlier TJ’s to adapt to the newer 2005-2006 TJ fuel pump that is required for this tank. You must use a 2005-2006 pump this does NOT allow the use of the older pumps.
Factory fuel filler hose & vent tube from a 97'-02' TJ (not included). TJ's made between 03'-06' will need to purchase the older style fuel filler hose and vent.
Jeep TJ fuel pump from a 2005-2006 model ONLY (NOT included)
Fuel pump seal (Mopar #55366298AA – NOT included)
When routing vent hose from the brass roll over valve be sure to loop the hose all the way around the tank before exiting out underneath the Jeep. If running Evap this is the same hose that you will tie into that system.

Product Components

Instructions

Installation Instructions

Stretch Underbody Fuel Cell for TJ / LJ

Specifications

Instructions

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Stretch Underbody Fuel Cell for TJ / LJ

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