Smaller engines like the 570 can run cool enough in winter that a coolant heater struggles. The Firestorm PRO kit for the 2016-2025 Ranger Full-Size 570 deals with that by including a thermostat bypass kit, so warm coolant keeps moving through the heater core. You also get three fan speeds, four outlet ports feeding the defrost vents and a hidden core for a factory look.
Why the PRO Kit Suits the 570
- Thermostat bypass kit is in the box for steadier, more continuous heat on a 570 engine.
- Three fan speeds from a heavy-duty squirrel cage fan.
- Four dedicated outlet ports push air to the included defrost vents.
- No visible heater core in the cab.
- Moto Alliance says the kit includes brackets, all hoses, stainless clamps, aluminum fittings and electrical connectors, so there are no extra trips to the hardware store.
Getting Steady Heat from a 570
- Do not skip the bypass kit. It is there to keep coolant flowing through the heater.
- Start on a low fan speed until the engine warms up, then turn it up.
- Moto Alliance lists a 3-year warranty on this kit. Keep your receipt.
Firestorm PRO Specifications
- Thermostat bypass kit included for steady, continuous heat
- Adjustable temperature setting on the heater, with 360-degree louvers
- Three fan speeds driven by a heavy-duty squirrel cage fan
- Four dedicated outlet ports that push air to the included defrost vents
- 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
- Heat exchanger built to pull maximum BTU from the radiator at 0-125 CFM
- All installation hardware and instructions included
- Moto Alliance lists a 3-year warranty on this kit
Fitment
| Year | Make | Model |
|---|---|---|
| 2016-2025 | Polaris | Ranger 570 Full-Size |
Note: Moto Alliance's title lists 2016-2026, but the description and fitment list 2016-2025. We list 2016-2025. Ask us about a 2026.
Note: For the 2015 Ranger Full-Size 570, use the HT_CU_404-570 kit.
What's in the Box
- Firestorm PRO heater unit with three-speed squirrel cage fan
- Thermostat bypass kit
- Defrost vents and 360-degree louvers
- Mounting brackets made for the Ranger Full-Size 570
- All hoses, stainless steel clamps and aluminum hose fittings
- Electrical connectors, installation hardware and instructions
Who It's For and What Pairs Well
This heater is for full-size 570 owners who use the machine for winter chores and hunting. Close in the cab with a Ranger windshield, a roof and Ranger 570 doors. A Ranger snow plow makes it a full winter setup.
Installation Notes
Install the thermostat bypass and the heater together, following the HT_CU_404-571 PDF. The kit includes the Ranger-specific mounting brackets, hoses, stainless steel clamps, aluminum hose fittings and electrical connectors. After plumbing, top off and bleed the cooling system, then check every clamp once the engine is warm.
- source:
- motoalliance
- ma_url:
- https://www.motoalliance.com/Firestorm-PRO-OEM-UTV-Cab-Heater-with-Defrost-for-Polaris-RZR-570-Full-Size_2
- desc_status:
- written_2026-10-28
- ma_parts:
- HT_CU_404-571 $399.99
