20 Gallon Fuel Cell for LWB Conversion / 15" Stretch - Jeep YJ / TJ / LJ

Spec sheet

Collected from 1 supplier page - confirm fit with the supplier before ordering.

Whether you already have a Jeep LJ running a Motobilt LJ Back Half Kit, are converting a standard-wheelbase TJ to LJ dimensions, or are stretching a YJ to LJ length with the Motobilt 15" Stretch Back Half, fuel tank placement becomes an important part of the rear chassis layout. The MB5074 was designed specifically for these builds, allowing the fuel cell to mount between the rear frame rails behind the axle instead of taking up valuable cargo space inside the Jeep. In the past, one of the common solutions was putting a fuel cell inside the Jeep behind the seats. That takes up valuable cargo room and puts the fuel cell inside the passenger compartment. The Motobilt MB5074 20 Gallon Fuel Cell was designed to move that fuel storage out of the interior and into the space created by the new rear chassis layout. The MB5074 mounts between the rear frame rails and behind the rear axle , keeping the cargo area open while providing 20 gallons of fuel capacity. It is designed around the Motobilt MB3067 15" Stretch Back Half for the Jeep YJ, the MB3020-S and MB3020-W LJ Back Half Kits commonly used to convert a Jeep TJ to LJ dimensions, and the upcoming MB3082 LWB Conversion Back Half. The 20-gallon fuel cell is constructed from 5052 aluminum and protected underneath by an A36 steel skid plate. A CNC-machined aluminum filler neck with a threaded cap and O-ring provides a secure fill point. A brass rollover valve and vent hose are included for tank venting, along with a 1/2" plugged port that can be used as a return port when required by the fuel system. Included access hatch: The MB5074 includes the MB5031 Universal Fuel Access Hatch Kit , providing lockable service access to the fuel pump from above. The hatch kit includes the adjustable keyed compression latch, access door, top trim plate and recessed hatch. The MB5515 fuel pump mounting ring is already welded into the tank. This provides the mounting interface for a compatible fuel pump, but the fuel pump itself is not incl

Suppliers (1)

• Motobilt

  20 Gallon Fuel Cell for LWB Conversion / 15" Stretch - Jeep YJ / TJ / LJ · Orderable · stock unverified

  Checked Nov 5, 2026
  $1,799.00
  View at supplier

Price history