FOX iQS Intelligent Quick Switch Shock Kit for Polaris RMK Models, Part Number 854-21-003

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Fox’s new Intelligent Quick Switch allows you to select damping profiles with a handlebar mounted switch. No more counting clicks with the electronic modal damping control, SCU (Suspension Control Unit).

Upgrade compatible Polaris RMK snowmobiles with the FOX iQS Intelligent Quick Switch Shock Kit, featuring electronic modal damping control through a Bosch Suspension Control Unit (SCU). This complete system allows riders to select from four suspension modes using a weather-resistant, handlebar-mounted switch. Profiles can be changed on the fly to match changing terrain and riding conditions, eliminating the need to manually count damping clicks.

The FOX iQS system provides full-range adjustment in less than one second, helping improve ride handling, control, efficiency, convenience, safety, and overall performance. LED-backlit buttons indicate the active suspension mode, while the plug-and-play wiring harness simplifies installation. The kit includes two FOX iQS front ski shocks, one FOX iQS center track shock, one FOX iQS rear track shock, Bosch SCU, handlebar switch, cable guards, and mounting hardware.

Designed for select Polaris RMK applications, this FOX shock kit fits the 2023 Polaris 850 RMK Khaos 155-inch, 2024 Polaris 850 RMK Khaos 155-inch, and 2025 Polaris 850 RMK Khaos 155-inch models. It also fits the 2023 Polaris Patriot Boost RMK Khaos Slash 163-inch and 165-inch models, the 2024 Polaris Patriot Boost RMK Khaos Slash 165-inch model, the 2023 Polaris Patriot 9R RMK Khaos Slash 163-inch model, and select 2024 Polaris 650 and 850 RMK Khaos Slash models with 146-inch and 155-inch track configurations. Verify the exact model and application before ordering.

Brand: FOX
Manufacturer Part Number: 854-21-003
Vendor Part Number: 530-1151
Model: iQS Intelligent Quick Switch Shock Kit

Features:

  • Full-range damping adjustment in less than one second
  • Four rider-controlled suspension modes
  • Handlebar-mounted switch enables on-the-fly profile selection
  • LED-backlit buttons indicate the active suspension mode
  • Weather-resistant controls for snowmobile use
  • Electronic modal damping control through a Bosch Suspension Control Unit
  • Plug-and-play wiring harness for streamlined installation
  • Includes two FOX iQS front ski shocks, one center track shock, and one rear track shock
  • Includes Bosch SCU, handlebar switch, cable guards, and mounting hardware
  • Compatible with select 2023-2025 Polaris RMK Khaos and RMK Khaos Slash models

Fitment:
2023 Polaris 850 RMK Khaos 155"
2023 Polaris 850 RMK Khaos Slash 163.3"
2023 Polaris Patriot 9R RMK Khaos Slash 155"
2023 Polaris Patriot 9R RMK Khaos Slash 163"
2023 Polaris Patriot 9R RMK Khaos Slash 165"
2023 Polaris Patriot Boost RMK Khaos Slash 163"
2023 Polaris Patriot Boost RMK Khaos Slash 165"
2024 Polaris 650 RMK Khaos Slash 146"
2024 Polaris 850 RMK Khaos 155"
2024 Polaris 850 RMK Khaos Slash 146"
2024 Polaris 850 RMK Khaos Slash 155"
2024 Polaris 850 RMK Khaos Slash 165"
2024 Polaris Patriot 9R RMK Khaos Slash 146"
2024 Polaris Patriot 9R RMK Khaos Slash 155"
2024 Polaris Patriot 9R RMK Khaos Slash 165"
2024 Polaris Patriot Boost RMK Khaos Slash 155"
2024 Polaris Patriot Boost RMK Khaos Slash 165"
2025 Polaris 850 RMK Khaos 155"
2025 Polaris 850 RMK Khaos Slash 155"
2025 Polaris 850 RMK Khaos Slash 165"
2025 Polaris Patriot Boost RMK Khaos Slash 155"
2026 Polaris 850 RMK Khaos 155"