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RPM SXS
SKU FTK-PO-4
$769.95
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We’re not just a parts store — we ride, race, and build UTVs every day. Trusted by thousands of off-roaders, we’re your go-to source for real-world tested gear.

Pro R, Turbo R, Pro XP 4 Seat 4.5 Gallon Auxiliary Fuel Tank

The RPM Auxiliary Tank fills a factory empty void under the drivers side, rear passenger seat with this awesome fuel tank extending your fun time drastically nearly 50%! No chassis, factory plumbing, or emissions components are altered during installation and all factory folding seat storage options remain in tact. No routing fuel lines near drivetrain components, NO relocating wiring, NO relocating batteries.  Built from extremely thick 4mm aluminum and fully tig welded it goes without saying that these are very heavy duty tanks. This kit utilizes the factory fill neck for filling AND ventilation which makes use and installation quick and a breeze as well as insuring there are no in cab fuel fumes that you'd experience with other kits. Included with every tank is a plug and play wiring harness complete with a momentary switch. This switch allows you to be worry free of accidentally turning on, or leaving your pumps activated and running. One switch controls multiple tanks alleviating any unneeded wiring.  The high volume fuel pump can pump 1.25 GPM which is drastically faster than the competition. All fittings, pump, plug and play wiring harness, and hardware is included along with easy to follow, detailed instructions. 

RPM tanks, unlike other dangerous designs, utilize the factory tip over check valve. In the unfortunate case of a rollover, the RPM tanks would not be able to leak fuel creating a dangerous situation. This is done by the use of the factory breather system. Overfilling the factory tank is often a concern, but with RPM's unique set up, the OEM tank could reach maximum capacity and all of the excess fuel would simply be circumvented back to the auxiliary tanks, leaving your riding adventures worry free.

  • 4.5 Gallon Capacity
  • 4mm Thick Aluminum Construction
  • Plug & Play Wiring Harness
  • Includes All Hardware & Fittings
  • Fits all CA and Non-CA models with charcoal canister
  • OEM Folding Seats Remain Fully Operational

Fits all years, models, & versions of the following machines

4 seat models ONLY

2022-2025

Pro R 4     Turbo R 4      Pro XP 4      Pro S 4

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QUESTIONS & ANSWERS
How long does it take for my order to arrive?
What is your return policy?
How do I know if a part will fit my specific UTV make and model?
How long does it take for my order to arrive?
Shipping times vary depending on your location and shipping method selected during checkout. Standard shipping typically takes 5-7 business days, while expedited shipping can take 1-3 business days. 
What is your return policy?
Returns are only accepted if R1 Package Protection was purchased at checkout, which includes a 14-day return window, free shipping, and no restocking fees. Exchanges are allowed with or without R1 protect, though non-R1 protect exchanges are subject to fees and shipping costs. All items must be unused, in original packaging, and meet strict resellable condition standards to qualify.
How do I know if a part will fit my specific UTV make and model?
Great question—fitment is everything when it comes to performance and safety. Every product page on our site includes a “Will this fit my machine?” section with detailed compatibility info. If you’re still unsure, give our team a call at 801-899-2520 or email support@r1industriesoffroad.com—we’ll confirm fitment before you buy, so you get exactly what you need the first time.
How can I start a return?
What happens if my order is damaged during shipping?
What if I need to return something but didn’t buy R1 Package Protection?
How can I start a return?
Please call or email us at support@r1industriesoffroad.com or 801-899-2520 
What happens if my order is damaged during shipping?
 If you added R1 Package Protection at checkout, you’re fully covered! R1 handles lost, stolen, or damaged packages with zero hassle. If you didn’t purchase R1 protect, reach out to us at 801-899-2520 and we’ll do our best to help, but we strongly recommend protecting your order with R1 protect for full peace of mind.
What if I need to return something but didn’t buy R1 Package Protection?
Without R1 protect, all returns are subject to restocking fees —no exceptions. However, we do offer exchanges for qualifying items within 14 days of delivery, though fees and shipping both ways will apply. If you’re unsure about an item, we recommend reaching out before you buy—we’re here to help you get it right the first time.
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