Unlock the full potential of your Polaris RZR Pro XP, Turbo R, or Pro S with the Stage 3 Lock & Load Kit by Aftermarket Assassins. Designed for 2021 and newer models, this performance package delivers an exceptional increase in horsepower, torque, and throttle response while maintaining reliability and drivability on every terrain. Please note that this kit does not fit 2020 Pro XP models due to differences in helix design and intake configuration.
This Stage 3 kit combines advanced tuning, precision clutching, and a high-performance exhaust system to provide maximum power transfer to the wheels. The custom-tuned ECU optimizes boost, timing, and fueling for impressive horsepower gains while keeping your engine safe under demanding conditions. With the included PV3 tuner, you can easily flash your ECU through the diagnostic port—no need to send it in. The tuner also reads and clears diagnostic codes, logs real-time data, and ensures your RZR runs with the latest firmware updates for smooth, consistent performance.
The included S3 clutch kit provides smoother shifting and better power delivery, while the stainless slip-on exhaust system reduces back pressure and enhances airflow. Supporting components like the billet blow-off valve, high-flow charge tube, and post-airbox intake tube ensure your turbo system operates efficiently, even under high boost. Iridium spark plugs come pre-gapped for optimal combustion and longer life, solving common low-power issues found in stock setups.
For those seeking custom performance, the kit supports multiple tune levels ranging from moderate gains on pump gas to extreme horsepower increases with race fuel or E85. Boost levels can reach up to 25 PSI with 215 rear-wheel horsepower at higher tune levels. Each tune is calibrated for specific fuel grades and supporting mods, ensuring flexibility for any riding style—from trail cruising to competitive racing.
Additional features include throttle-by-wire limiter removal, increased fan cooling efficiency, raised rev and speed limits, and optional “Start in Any Gear” functionality. The Stage 3 kit also includes setup guidelines for tire sizes (29"–35") and tune levels, helping you fine-tune your clutch performance for your specific configuration. For heavy-duty applications or aggressive driving, optional upgrades like the HD primary clutch or Revolver Tower Lock Cover further enhance durability and reliability.
Aftermarket Assassins’ tuning expertise and in-depth development process ensure unmatched results. Every tune and component has been tested extensively on the dyno and in real-world conditions. Whether tackling dunes, trails, or rocky climbs, this kit transforms your RZR into a high-powered machine that responds instantly to every command. Experience faster acceleration, stronger mid-range pull, and higher top-end speed—all while maintaining the reliability you expect from your Polaris.
Take your RZR Pro XP, Turbo R, or Pro S to the next level with the Stage 3 Lock & Load Kit—engineered for riders who demand uncompromising performance, precision, and power.