Straightline Performance Ski-Doo 850 Turbo Stage 5 ECU Flash
Straightline Performance Ski-Doo 850 Turbo Stage 5 ECU Flash is backordered and will ship as soon as it is back in stock.
Shipping & delivery
Usually ships in 2–3 business days unless a different lead time is shown on this page. Shipping cost is calculated at checkout (UPS or USPS to the contiguous U.S.).
Shipping policy · Returns · Fitment questions? (561) 207-7988
Delivery and Shipping
Delivery and Shipping
Standard order processing is 2–3 business days unless this product or your order confirmation states a different lead time. Custom-built, made-to-order, backorder, and pre-order items follow their stated lead times.
Enclosures and subwoofer boxes ship for $50 per unit. Other shipping charges are calculated at checkout. Orders outside the contiguous 48 United States may require additional shipping; we will contact you for approval before shipment.
Subwoofer boxes ship UPS Ground where available. Read our Shipping Policy and Return and Refund Policy for delivery, product-specific return windows, and warranty details.
Straightline Performance Ski-Doo 850 Turbo Stage 5 ECU Flash
Straightline Performance Ski-Doo 850 Turbo Stage 5 ECU Flash is backordered and will ship as soon as it is back in stock.
Description
Description
This Stage 5 ECU flash recalibrates the factory ECU on your Ski-Doo 850 Turbo, unlocking 205+ horsepower on 91 octane pump gas. Installation is plug-and-play through the factory diagnostic port, with no additional boxes, wiring, or splicing required. The kit includes a clutch kit calibrated for the new horsepower, intake and charge tubes, and a Vari-Sound muffler. The flash also adds on-board diagnostics for reading and clearing fault codes, real-time system status, and data logging of boost, RPM, throttle position, and temperatures directly from your phone.
The included calibration fits Ski-Doo 850 Turbo models from 2024 to current. If you do not purchase the clutch kit, clutching adjustments are required to match the increased output. Everything installs through the stock ECU, so the sled keeps its factory reliability while gaining competition-calibrated throttle response and boost control.
| Brand | Straightline Performance |
| Product Type | ECU Flash |
| Compatibility | Ski-Doo 850 Turbo |
| Year | 2024-Current |
| Horsepower Gain | 205+ HP |
| Fuel Type | 91 Octane Pump Gas |
| Installation | Plug-and-Play |
| Included Components | Vari-Sound Muffler, Clutch Kit, Charge and Intake Tubes |
| Diagnostics | Read and clear fault codes, view real-time system status |
| Data Logging | Records boost, RPM, throttle position, and temperatures |
| Control Interface | Smartphone app (no laptop required) |
| Weight | 6 lbs |
Fitment & installation
Fitment & installation
Check the selected part against your vehicle. Need help? Call (561) 207-7988.
Selected part: 141-115
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Read FOX’s application notes for part 987-24-001 (rear shock)
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