RPM RZR Pro R, Turbo R, Pro XP, Pro S 4 Seat 6 Gallon Auxiliary Fuel Tank

RPM 6-Gallon Auxiliary Fuel Tank 

Maximize your trail range and push deeper into the dunes, rocks, or desert with the RPM SXS 6-Gallon Auxiliary Fuel Tank! Specially engineered to drop directly into the empty factory space under the driver’s side rear passenger seat, this auxiliary system expands your total fuel payload by ~50% without sacrificing interior comfort, cargo room, or folding seat functionality.

Installation is completely clean, non-invasive, and non-destructive—zero cutting into the chassis, zero relocation of batteries, and zero interference with factory emissions, wiring, or plumbing. All fuel transfer lines are routed safely away from drivetrain components. Built from heavy-duty 5mm rotomolded plastic, this tank ties straight into the OEM fill neck for simple filling and venting, keeping 100% of fuel fumes outside the cockpit.

Safety is engineered into every component: the system retains your factory tip-over check valve to keep fuel fully contained in a rollover, while an auto-bleed vent safety line automatically routes any main-tank overfill back into the auxiliary tank. Powered by an industry-leading 1.25 GPM high-volume pump, it transfers fuel fast via a plug-and-play harness with an integrated momentary switch—eliminating accidental pump burnouts or over-pumping.

Features:

• +6 Gallon Auxiliary Fuel Expansion: Expands your range by roughly 50%, letting you stay out on the trail longer without carrying dangerous gas cans.

• Under-Seat Drop-In Fitment: Installs neatly under the driver's side rear passenger seat while maintaining 100% of factory folding seat functions.

• Heavy-Duty 5mm Rotomolded Construction: Ultra-durable, impact-resistant plastic designed for extreme off-road punishment.

• High-Volume 1.25 GPM Fuel Transfer: Industry-leading pump transfers fuel quickly to get you back to driving fast.

• Plug-and-Play Wiring & Momentary Switch: Clean, pre-wired setup featuring a momentary toggle switch that prevents dry-running or burning out the pump.

• Zero Interior Fumes & Non-Invasive Install: Ties into the OEM fill neck for filling and venting; zero cutting, zero battery relocation, and zero cab gas smells.

• Advanced Rollover & Overfill Protection: Preserves factory tip-over safety valves and features automatic overfill recirculation back to the aux tank.

• Includes Locking Gas Cap: Comes equipped with an OEM-style Kelch locking gas cap for added security.

What's Included in the Kit:

• (1) RPM 6-Gallon Rotomolded Auxiliary Fuel Tank

• (1) 1.25 GPM High-Volume Fuel Transfer Pump

• (1) Plug-and-Play Wiring Harness with Inline Fuse & Momentary Switch

• (1) OEM-Style Kelch Locking Fuel Cap

• Complete High-Flow Hose Kit, Fittings & Stainless Mounting Hardware

• Detailed Step-by-Step Installation Guide

Fitment (4-Seat Models Only):

• Polaris RZR PRO XP 4 (2020–2026)

• Polaris RZR TURBO R 4 (2022–2024)

• Polaris RZR PRO R 4 (2022–2026)

• Polaris RZR PRO S 4 (2025–2026)

Compatibility

This part is compatible with 17 vehicle(s)