The Wolverine RMAX is a comfortable machine, and heat makes it a lot more comfortable in winter. The Firestorm HT_CU_438 is custom designed for the 2020-2026 RMAX and can push up to 18,000 BTU into the cab. The kit comes with everything for the install, including radiator hose cut to length, custom brackets and the hole saws you need.
RMAX Highlights
- Fits 2020-2026 Yamaha RMAX per Moto Alliance.
- Up to 18,000 BTU from a heat exchanger Moto Alliance redesigned in 2024.
- Adjustable temperature and fan speeds with 360-degree louvers.
- Hole saws included, so you do not have to buy them separately.
RMAX Tips
- Mark your hole locations from the PDF before cutting.
- Doors and a windshield make the biggest difference in how warm the RMAX cab gets.
- In summer, close the shutoff so heated coolant skips the cab.
Firestorm Heater Specifications
- Heat output: up to 18,000 BTU from engine coolant at 0-125 CFM, from a heat exchanger Moto Alliance redesigned in 2024
- Adjustable temperature setting and fan speeds, with 360-degree louvers
- Built-in shutoff valve to close off coolant flow in warm weather
- High-grade radiator hose rated from -40 to 120 degrees C
- High-performance alloy Y connectors
- All installation hardware and instructions included
Fitment
| Year | Make | Model |
|---|---|---|
| 2020-2026 | Yamaha | Wolverine RMAX (listed by Moto Alliance as RMAX) |
Note: Moto Alliance lists this for the "Yamaha RMAX". It does not say whether it fits the 2-seat, the 4-seat, or both.
What's in the Box
- Firestorm heater unit with temperature and fan-speed controls
- Custom installation brackets for the Yamaha RMAX
- Automotive-grade radiator hose cut to length
- Alloy radiator Y connectors
- Hole saws
- Installation hardware and instructions
Who It's For and What Pairs Well
This heater is for RMAX owners riding trails, hunting and working in the cold. Pair it with an RMAX windshield and doors, and add an RMAX snow plow or RMAX winch.
Installation Notes
The kit includes custom brackets, radiator hose cut to length, alloy Y connectors and hole saws. Follow the HT_CU_438 PDF carefully, since you will be cutting openings with the hole saws. Measure twice before you cut. Refill and bleed the coolant after plumbing, and check for leaks after the first warm-up.
- source:
- motoalliance
- ma_url:
- https://www.motoalliance.com/firestorm-cab-heater-wolverine-rmax
- desc_status:
- written_2026-10-28
- ma_parts:
- HT_CU_438 $399.99
