Exterior Components Body Panels and Components

Rotopax

~(1.3 lbs. 6X6X1)~ RotoPax 3 Gallon Extension

$44.99

SKU: R021 RX-3EXT

In Stock
In Stock
Ships by Sep 23
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Overview

The RotopaX 3 Gallon Extension is an accessory designed to stack fuel packs. It allows you to stack any Fuel Pack on top of a 3 Gallon RotopaX, 3.5 FuelpaX, or 4.5 FuelpaX. The dimensions are 4" x 1" x 5 1/4".
Show original supplier description

Part #: RX-3EXT

~(1.3 lbs. 6X6X1)~ RotoPax 3 Gallon Extension

Vehicle Symptoms
  • Running out of fuel on long trips
  • Limited range for off-road adventures
  • Need to carry extra fuel without interior clutter
  • Frequent fuel stops on extended road trips
  • Wanting to maximize fuel storage capacity
Relevant Conversations
  • How to stack Rotopax containers together
  • Rotopax 3 gallon extension review
  • Best way to add extra fuel capacity to Jeep
  • Can I stack a 3gal Rotopax on a 1gal?
  • Rotopax extension vs standard mount
  • Rotopax mounting on roof rack
  • Extra fuel for overlanding rotopax
  • Rotopax extension install time
  • Rotopax vs Scepter fuel cans
  • Where to buy Rotopax extension

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRotopax
Part NumberR021 RX-3EXT

About MOTORMIA

5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy