Extend your range and keep the adventure going up to 50% longer! The RPM SXS Auxiliary Fuel Tank fills the unused void behind the driver's seat on 2-seat Polaris RZR Pro R models, adding 5.2 gallons of fuel capacity without sacrificing an inch of cab comfort. Engineered to integrate seamlessly into the factory chassis, this kit requires zero cutting, chassis modifications, or alterations to factory emissions and plumbing. Best of all, full OEM driver seat adjustment is 100% retained—allowing you to slide the seat all the way back with zero legroom loss.
Built from heavy-duty 5mm roto-molded polyethylene, the tank walls are nearly double the thickness of stock fuel tanks for ultimate puncture and impact resistance. The kit plumbs through the factory fill neck for both filling and ventilation, making fill-ups effortless while ensuring zero fuel fumes enter the cab.
Safety is built in at every level: the system integrates directly with the factory tip-over check valve to prevent fuel spillage in the event of a rollover. Additionally, RPM's unique siphon architecture eliminates overfilling concerns—if the primary tank reaches maximum capacity during fuel transfer, excess fuel simply recirculates back into the auxiliary tank worry-free!
Equipped with an ultra-fast 1.25 GPM high-volume transfer pump, this system moves fuel drastically faster than competitor kits. It includes a complete plug-and-play wiring harness featuring a momentary control switch—ensuring you never have to worry about accidentally leaving the pump running dry or draining your battery. The tank is finished with an OEM-style Kelch ratchet fuel cap featuring a click-to-seal torque limiter to prevent over-tightening.
5.2 Gallon Fuel Extension: Increases total fuel range by nearly 50% for long-distance desert and dune rides.
5mm Heavy-Duty Roto-Molded Construction: Ultra-thick plastic tank walls offer double the thickness of standard OEM fuel tanks for extreme durability.
Full Seat Adjustment Retained: Fits behind the driver seat while allowing the OEM seat to slide to its furthest rearward position with zero loss of legroom.
1.25 GPM High-Flow Transfer Pump: High-volume electric pump transfers fuel quickly and efficiently into the primary tank.
Momentary Safety Switch & Plug-and-Play Wiring: Included complete wiring harness with momentary activation prevents accidental pump burn-out.
Factory Tip-Over Valve Integration: Utilizes the OEM rollover check valve system to eliminate fuel leaks and hazardous spills in a rollover.
Fume-Free In-Cab Operation: Integrates into the factory fill neck and vent architecture, keeping fuel odors completely out of the cab.
Overfill Protection Architecture: Automatically recirculates excess fuel back into the auxiliary tank if the main tank fills completely.
Kelch Click-To-Seal Ratchet Cap: OEM-quality fuel cap prevents thread damage and over-tightening.
No Permanent Modifications: Mounts rigidly using factory chassis points and heavy-duty stainless steel brackets.
(1) 5.2 Gallon Roto-Molded Auxiliary Fuel Tank
(1) 1.25 GPM High-Volume Fuel Transfer Pump
(1) Plug-and-Play Wiring Harness with Momentary Switch
(1) Kelch Click-To-Seal Fuel Cap
Stainless Steel Mounting Brackets & Hardware
All Required Fuel Hoses, Fittings, & Adapters
Polaris RZR Pro R (2-Seat Models - All Trims & Variations): 2022–2026
(Note: Designed specifically for 2-Seat Pro R models. Does not fit 4-Seat Pro R 4).
All orders typically ship within 2-4 business days of order being placed. Weekends, holidays, and weather may slow fulfillment down on order processing. Unless otherwise noted, backordered items will ship according to their estimated shipping times.
Overall rating: 4.9 / 5 from 35 reviews.
Installing was not too difficult. Followed along with a you tube video. Peace of mind having enough fuel for a ride is great. I was able to get the seat in all the way back with it in the tilted position. Only issue I had. I wish there was a printed instruction. Instead of following on my tablet. But I am old school.
I put the RPM RZR Pro R 2‑seat 5.2 gallon auxiliary fuel tank on my Pro R and I’m really happy with it. The overall quality is awesome – the tank itself feels stout, the welds and finish look great, and the fittings are honestly top‑tier compared to a lot of aftermarket stuff I’ve used. Install took me right around 2½ hours in the garage, just taking my time routing lines cleanly and double‑checking everything. It’s not hard, but it is a bit involved, so you’ll want basic tools and a little patience. Once it was in, everything fit like it should with no weird forcing or tweaking, and the extra fuel capacity is super nice for longer rides so I’m not stressing about range all day. Overall, I’d definitely recommend it to anyone with a Pro R who actually puts miles on their machine.
Easy to install.it took a while. I love it . I don’t have to worry about running out of gas when we’re on a long trip anymore. Don’t have to carry Roto packs no more I like the push and hold so it will stop when you release the button and not have to worry about forgetting about it overfilling. Love it guys thanks. Todd
The RPM auxiliary fuel tank is such a great product for any side-by-side. Also with RPMs Customer Service being top notch, you can’t go wrong. Now, no matter how far we ride I always have peace of mind knowing I have the extra fuel to go on those long rides. Thanks, RPM SXS Mike A
Fits perfect with my Simpson seats
Installed the plastic RPM 5.2 gallon tank, very easy install, it fits with no issues brackets line up very well the complete installation is straightforward, very happy great product!
Install went pretty smooth. I did have to drill a couple of holes and need to use a longer bolt for one of the brackets. Overall very satisfied.
Very happy! Worked great for prerunning long miles in Baja. Detailed installation instructions. Company has good communication. Great investment and worth every penny.
Great quality! Great product! Great solution!
Fuel cell fits great, very easy to install.
Fit perfectly in place. Deriextions could use a little more thought and more clarity. Customer service was great.
RZR Pro R 2 Seat 4 Gallon Auxiliary Fuel Tank (Pre Order)(See Description)
It all fit in like a glove. Very sturdy product.There customer care people are great to deal with.
Fits like a glove. Great product. Wish the on/off switch wasn’t momentary and was on or off ( but that can be changed out ).
Great experience!
Ok
Great product
Great tank, very tight fit. Instructions need help
Quality product. Best install instructions I’ve seen.
RPM has done it again! My Rzr Pro R has the power but unfortunately burns the fuel. My friends could ride hours longer due to the Pro R using so much fuel. Now I can hang in the mountains longer and throttle hard thanks to my new RPM auxiliary tank. Thank you RPM.
Fits great
Sorry not installed yet. Everything looks good though.wont install till spring
I ordered this tank to keep from carrying dangerous flimsy gas cans to refuel on the trails. This tank fit perfectly and is anything but flimsy and no more worrying if the portable tanks are about to blow! So I am a happy customer amazing product!
Had this for over a year. Very secure and well built. The addition fuel is great to have. The only problem is transfer speed of fuel. It should take about 4 minutes but it’s not like 12. This is due to the venting. If you open both caps the time is closer to the 4 minutes.
perfect fit
These fit just right and so convenient
The installation was smooth. It's a well built product.
Easy to order to Canada. Shipped quickly. Item was exactly as expected.
Install is simple enough for anyone to DIY and have an extra 4 gallons of fuel for those longer rides!!
Fits perfect as advertised. Looks awesome! Very well built. Had to do a couple mods for the side mount because I don’t have the factory doors or mounts. Worked great on our trip last weekend to Tackett Creek. Even layed her over on the driver side and it never budged. Excellent upgrade! Would recommend to anyone that likes to put the miles in.
Quality purchase. Great welds, awesome design. Seat still functions as normal. Would of like to of seen some kind of clamps on the fuel lines. Guess it low pressure with barbs on the fittings therefore no issues, just a thought. Pictures and directions for install could be a little better but with some mechanical knowledge you will be good to go. Download the directions on the web site, makes it easier that working through your phone. Super-fast shipping!!! Thank You.
Very good quality and great looking, I just wish people still gave you printed instructions 🤔
Product is a work of art! The installation instructions definitely have room for improvement.
Though I have not had the opportunity to install the product, I would like to take a minute to share my initial impression of the product and RPM Powersports. Responsive, fast to ship and package arrived quickly. Product was packaged extremely well to prevent any damage during shipping. This 4 gal aux. tank is a freaking work of art. The craftsmanship and quality are unbelievable. Second to none. Downright awesome. I just wanted to take a minute to thank RPM Powersports and to say kudos for amazing craftsmanship and over the top care in packaging the product to protect it during shipping in order to make sure it arrives damage free. It is extremely refreshing to see this level of pride, craftsmanship and care in an American company and their products. Thank you.
5 star product but instructions and pictures need to be redone for the Pro R. Once installed I love having extra fuel to transfer.
Very well-built everything seems to be thought through thoroughly so installation is easy. This is a problem-solving company.
