aRacer ECU. FastUTV tuned.
An aRacer ECU with three FastUTV tuning maps for Polaris RZR Pro R (2022+).
$2,369 retail — ECU and three maps included. The same ECU-and-tuning price applies across our Can-Am and Polaris aRacer packages.
Choose one fuel family
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Gasoline only: three gasoline maps, such as 91, 100 and 110 octane, matched to your vehicle and fuel requirements.
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E85 only: three enhanced maps using E85 as the base fuel, with different power levels and, on boosted builds, different boost levels.
Gasoline and E85 cannot be combined in the same three-map package. This package does not provide flex-fuel operation.
Configured for your build
FastUTV develops the tuning for your vehicle. Confirm the year, model, modifications and chosen fuel family with FastUTV before calibration. Supporting hardware and final map settings depend on the vehicle and fuel system.
Supporting hardware, accessories, installation and dyno time are separate from the ECU-and-three-map price. No specific horsepower or boost figure is promised.
Fitment
- Polaris RZR Pro R 2022+
- Polaris RZR Pro R 4 2022+
Fitment Note: Exact model year, market version, ECU connector, trim, and wiring configuration must be confirmed before ordering.
Continental US overnight shipping
Choose UPS overnight shipping at checkout. Orders using this option ship the next business day; carrier transit begins after dispatch. This is not a promise of delivery the day after ordering. Rates are calculated at checkout for the contiguous 48 states and Washington, DC, where UPS offers service. Weekends and carrier holidays can affect delivery.
Complete vehicle and tuning details are required for ECU calibration.
Product notices
Competition Use Notice: Intended for closed-course competition, off-road, testing, research, or development use where applicable. Customer is responsible for compliance with all applicable laws and regulations.
California Proposition 65 Warning
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
From Our Shop
FastUTV stock Pro R E85 feature
In the joint June 12, 2026 post, our team reports a 35 HP gain from E85 tuning on a stock Pro R. This is a shop-reported result for that build. The caption does not establish wheel versus crank measurement, correction method, or a complete dyno test record. Results vary with vehicle condition, fuel, hardware, and calibration.
How we compare UTV tuning results
