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Scroll down for Fitment Applications FOX Quick Switch (QS) coil shocks for trail/crossover applications provide the same performance advantage FOX is known for in the backcountry now. Ride harder with less fatigue without a compromise of durability. Experience a new sense of control on the snow due to velocity and position-sensitive damping technology. Quickly adjust the compression damping with FOX's QS3 to suit snow conditions. Three positions keep the gloves on and the adjustment simple. Focus on riding instead of counting clicks. FOX's position-sensitive damping technology, Rifle Bore, is now applied to the Factory Race Series rear track shock. Spiral grooves inside the shock allow the oil to flow around the main piston, reducing the damping force in the ride zone for a plush feel. The grooves terminate through the final 30% of the travel, forcing oil to flow through the main piston. The result is a significant increase in bottom-out resistance to cushion hard hits. Maximize your sled performance by bolting on FOX's new trail/crossover shocks equipped with Rifle Bore position-sensitive technology and QS3 adjustment. Optimized lightweight spring & shock design FOX ice scraper technology (FIST) One-piece, aluminum mounting hardware High-flow velocity-sensitive damping Rifle Bore technology (Rear track shock only) Fully rebuildable and re-tunable Internal floating piston (IFP) 850-04-007 Fitment: 2023 Ski-Doo Backcountry E-TEC 600R 2023 Ski-Doo Backcountry E-TEC 850 2023 Ski-Doo Backcountry Sport 600 EFI 2023 Ski-Doo Backcountry X E-TEC 850 2023 Ski-Doo Backcountry X-RS E-TEC 850 146 2023 Ski-Doo Backcountry X-RS E-TEC 850 154 2024 Ski-Doo Backcountry Adrenaline E-TEC 600R 2024 Ski-Doo Backcountry Adrenaline E-TEC 850 2024 Ski-Doo Backcountry Sport 600 EFI 2024 Ski-Doo Backcountry X E-TEC 850 2024 Ski-Doo Backcountry X-RS E-TEC 850 146 2024 Ski-Doo Backcountry X-RS E-TEC 850 154 2025 Ski-Doo Backcountry Adrenaline E-TEC 600R 2025 Ski-Doo Backcountry Adrenaline E-TEC 850 2025 Ski-Doo Backcountry Sport 600 EFI 2025 Ski-Doo Backcountry X E-TEC 850 2025 Ski-Doo Backcountry X-RS E-TEC 850 146 2025 Ski-Doo Backcountry X-RS E-TEC 850 154 2026 Ski-Doo Backcountry Adrenaline E-TEC 600R 39in. 2026 Ski-Doo Backcountry Adrenaline E-TEC 850 39in. 2026 Ski-Doo Backcountry Sport 600 EFI-85 39in. 2026 Ski-Doo Backcountry X E-TEC 850 39in. 2026 Ski-Doo Backcountry X-RS E-TEC 850 146 39in. 2026 Ski-Doo Backcountry X-RS E-TEC 850 154 39in. 850-04-009 Fitment: 2021 Ski-Doo MX Z X E-TEC 600R 2021 Ski-Doo MX Z X E-TEC 850 2021 Ski-Doo MX Z X-RS E-TEC 600R 2021 Ski-Doo MX Z X-RS E-TEC 850 2021 Ski-Doo Renegade Adrenaline ACE 900 2021 Ski-Doo Renegade Adrenaline ACE 900 Turbo 2021 Ski-Doo Renegade Adrenaline E-TEC 600R 2021 Ski-Doo Renegade Adrenaline E-TEC 850 2021 Ski-Doo Renegade Enduro ACE 900 2021 Ski-Doo Renegade Enduro ACE 900 Turbo 2021 Ski-Doo Renegade Enduro E-TEC 600R 2021 Ski-Doo Renegade Enduro E-TEC 850 2021 Ski-Doo Renegade X ACE 900 Turbo 2021 Ski-Doo Renegade X E-TEC 600R 2021 Ski-Doo Renegade X E-TEC 850 2021 Ski-Doo Renegade X-RS ACE 900 Turbo 2021 Ski-Doo Renegade X-RS E-TEC 850 2022 Ski-Doo MX Z X E-TEC 600R 2022 Ski-Doo MX Z X E-TEC 850 2022 Ski-Doo MX Z X-RS E-TEC 600R 2022 Ski-Doo MX Z X-RS E-TEC 850 2022 Ski-Doo Renegade Adrenaline ACE 900 2022 Ski-Doo Renegade Adrenaline ACE 900 Turbo 2022 Ski-Doo Renegade Adrenaline ACE 900 Turbo R 2022 Ski-Doo Renegade Adrenaline E-TEC 600R 2022 Ski-Doo Renegade Adrenaline E-TEC 850 2022 Ski-Doo Renegade Enduro ACE 900 2022 Ski-Doo Renegade Enduro ACE 900 Turbo 2022 Ski-Doo Renegade Enduro ACE 900 Turbo R 2022 Ski-Doo Renegade Enduro E-TEC 600R 2022 Ski-Doo Renegade Enduro E-TEC 850 2022 Ski-Doo Renegade X ACE 900 Turbo R 2022 Ski-Doo Renegade X E-TEC 600R 2022 Ski-Doo Renegade X E-TEC 850 2022 Ski-Doo Renegade X-RS ACE 900 Turbo R 2022 Ski-Doo Renegade X-RS E-TEC 850 2022 Ski-Doo Renegade X-RS with Comp Package E-TEC 600R 2023 Ski-Doo MX Z X-RS E-TEC 600R 2023 Ski-Doo MX Z X-RS E-TEC 850 2023 Ski-Doo Renegade Adrenaline ACE 900 2023 Ski-Doo Renegade Adrenaline ACE 900 Turbo 2023 Ski-Doo Renegade Adrenaline ACE 900 Turbo R 2023 Ski-Doo Renegade Adrenaline E-TEC 600R 2023 Ski-Doo Renegade Adrenaline E-TEC 850 2023 Ski-Doo Renegade Enduro ACE 900 2023 Ski-Doo Renegade Enduro ACE 900 Turbo 2023 Ski-Doo Renegade Enduro ACE 900 Turbo R 2023 Ski-Doo Renegade Enduro E-TEC 600R 2023 Ski-Doo Renegade Enduro E-TEC 850 2023 Ski-Doo Renegade X ACE 900 Turbo R 2023 Ski-Doo Renegade X E-TEC 600R 2023 Ski-Doo Renegade X E-TEC 850 2023 Ski-Doo Renegade X-RS ACE 900 Turbo R 2023 Ski-Doo Renegade X-RS E-TEC 850 2023 Ski-Doo Renegade X-RS with Comp Package E-TEC 600R 2024 Ski-Doo MX Z Adrenaline E-TEC 600R 2024 Ski-Doo MX Z Adrenaline E-TEC 600R 137 2024 Ski-Doo MX Z Adrenaline E-TEC 850 2024 Ski-Doo MX Z Adrenaline E-TEC 850 137 2024 Ski-Doo MX Z Adrenaline with Blizzard Package E-TEC 600R 2024 Ski-Doo MX Z Adrenaline with Blizzard Package E-TEC 600R 137 2024 Ski-Doo MX Z Adrenaline with Blizzard Package E-TEC 850 2024 Ski-Doo MX Z Adrenaline with Blizzard Package E-TEC 850 137 2024 Ski-Doo MX Z X E-TEC 600R 2024 Ski-Doo MX Z X E-TEC 600R 137 2024 Ski-Doo MX Z X E-TEC 850 2024 Ski-Doo MX Z X E-TEC 850 137 2024 Ski-Doo MX Z X-RS E-TEC 600R 2024 Ski-Doo MX Z X-RS E-TEC 600R 137 2024 Ski-Doo MX Z X-RS E-TEC 850 2024 Ski-Doo MX Z X-RS E-TEC 850 137 2024 Ski-Doo MX Z X-RS with Competition Package E-TEC 600R 2024 Ski-Doo MX Z X-RS with Competition Package E-TEC 850 Turbo R 2024 Ski-Doo Renegade Adrenaline ACE 900 2024 Ski-Doo Renegade Adrenaline ACE 900 Turbo 2024 Ski-Doo Renegade Adrenaline ACE 900 Turbo R 2024 Ski-Doo Renegade Adrenaline with Enduro Package ACE 900 2024 Ski-Doo Renegade Adrenaline with Enduro Package ACE 900 Turbo 2024 Ski-Doo Renegade Adrenaline with Enduro Package ACE 900 Turbo R 2024 Ski-Doo Renegade Adrenaline with Enduro Package E-TEC 600R 2024 Ski-Doo Renegade Adrenaline with Enduro Package E-TEC 850 2024 Ski-Doo Renegade X ACE 900 Turbo 2024 Ski-Doo Renegade X ACE 900 Turbo R 2024 Ski-Doo Renegade X-RS ACE 900 Turbo R 2025 Ski-Doo MX Z Adrenaline E-TEC 600R 129 2025 Ski-Doo MX Z Adrenaline E-TEC 600R 137 2025 Ski-Doo MX Z Adrenaline E-TEC 850 129 2025 Ski-Doo MX Z Adrenaline E-TEC 850 137 2025 Ski-Doo MX Z Adrenaline with Blizzard Package E-TEC 600R 129 2025 Ski-Doo MX Z Adrenaline with Blizzard Package E-TEC 600R 137 2025 Ski-Doo MX Z Adrenaline with Blizzard Package E-TEC 850 129 2025 Ski-Doo MX Z Adrenaline with Blizzard Package E-TEC 850 137 2025 Ski-Doo MX Z X E-TEC 600R 129 2025 Ski-Doo MX Z X E-TEC 600R 137 2025 Ski-Doo MX Z X E-TEC 850 129 2025 Ski-Doo MX Z X E-TEC 850 137 2025 Ski-Doo MX Z X-RS E-TEC 600R 129 2025 Ski-Doo MX Z X-RS E-TEC 600R 137 2025 Ski-Doo MX Z X-RS E-TEC 850 129 2025 Ski-Doo MX Z X-RS E-TEC 850 137 2025 Ski-Doo MX Z X-RS with Competition Package E-TEC 600R 2025 Ski-Doo MX Z X-RS with Competition Package E-TEC 850 Turbo R 2025 Ski-Doo Renegade Adrenaline ACE 900 2025 Ski-Doo Renegade Adrenaline ACE 900 Turbo 2025 Ski-Doo Renegade Adrenaline ACE 900 Turbo R 2025 Ski-Doo Renegade Adrenaline with Enduro Package ACE 900 2025 Ski-Doo Renegade Adrenaline with Enduro Package ACE 900 Turbo 2025 Ski-Doo Renegade Adrenaline with Enduro Package ACE 900 Turbo R 2025 Ski-Doo Renegade Adrenaline with Enduro Package E-TEC 600R 2025 Ski-Doo Renegade Adrenaline with Enduro Package E-TEC 850 2025 Ski-Doo Renegade X ACE 900 Turbo 2025 Ski-Doo Renegade X ACE 900 Turbo R 2025 Ski-Doo Renegade X-RS ACE 900 Turbo R 2026 Ski-Doo Backcountry Adrenaline E-TEC 600R 43in. 2026 Ski-Doo Backcountry Adrenaline E-TEC 850 43in. 2026 Ski-Doo Backcountry Sport 600 EFI-85 43in. 2026 Ski-Doo Backcountry X E-TEC 850 43in. 2026 Ski-Doo Backcountry X-RS E-TEC 850 146 43in. 2026 Ski-Doo MX Z Adrenaline E-TEC 600R 129 2026 Ski-Doo MX Z Adrenaline E-TEC 600R 137 2026 Ski-Doo MX Z Adrenaline E-TEC 850 129 2026 Ski-Doo MX Z Adrenaline E-TEC 850 137 2026 Ski-Doo MX Z Adrenaline with Blizzard Package E-TEC 600R 129 2026 Ski-Doo MX Z Adrenaline with Blizzard Package E-TEC 600R 137 2026 Ski-Doo MX Z Adrenaline with Blizzard Package E-TEC 850 137 2026 Ski-Doo MX Z X E-TEC 600R 129 2026 Ski-Doo MX Z X E-TEC 600R 137 2026 Ski-Doo MX Z X E-TEC 850 129 2026 Ski-Doo MX Z X E-TEC 850 137 2026 Ski-Doo MX Z X-RS E-TEC 600R 129 2026 Ski-Doo MX Z X-RS E-TEC 600R 137 2026 Ski-Doo MX Z X-RS E-TEC 850 129 2026 Ski-Doo MX Z X-RS E-TEC 850 137 2026 Ski-Doo MX Z X-RS with Competition Package E-TEC 600R 2026 Ski-Doo MX Z X-RS with Competition Package E-TEC 850 Turbo R 2026 Ski-Doo Renegade Adrenaline ACE 900 2026 Ski-Doo Renegade Adrenaline ACE 900 Turbo 2026 Ski-Doo Renegade Adrenaline ACE 900 Turbo R 2026 Ski-Doo Renegade Adrenaline with Enduro Package ACE 900 2026 Ski-Doo Renegade Adrenaline with Enduro Package ACE 900 Turbo 2026 Ski-Doo Renegade Adrenaline with Enduro Package ACE 900 Turbo R 2026 Ski-Doo Renegade Adrenaline with Enduro Package E-TEC 600R 2026 Ski-Doo Renegade Adrenaline with Enduro Package E-TEC 850 2026 Ski-Doo Renegade X ACE 900 Turbo 2026 Ski-Doo Renegade X ACE 900 Turbo R 2026 Ski-Doo Renegade X-RS ACE 900 Turbo R
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🇺🇸 Ship from USA · On Agora since 2025
$1,349.99