STRAIGHTLINE PERFORMANCE 8704-S471249-64 Pipe Ski Doo 165

( Brand: Straightline Performance ), ( Manufacturer Part Number: 8704-S471249-64 ), ( Part Type: Pipe )

Review STRAIGHTLINE PERFORMANCE Y pipe Ski doo E tec 165 fits FREERIDE TURBO 850 2021–2022

The **Straightline Performance 8704-S471249-64 Y-Pipe** is a meticulously engineered, high-performance exhaust system designed exclusively for the **2021-2022 Ski-Doo Freeride E-TEC 850 Turbo 165**, delivering an unparalleled blend of power, efficiency, and precision for riders demanding maximum performance in the backcountry and aggressive terrain. Crafted from **high-grade, heat-treated stainless steel**, this Y-pipe is built to withstand the extreme forces and thermal cycling of high-revving, turbocharged engines while maintaining structural integrity and longevity. The **customized geometry** of the pipe ensures optimal exhaust flow, reducing backpressure and allowing the E-TEC 850 s turbocharged power delivery to reach its full potential with improved throttle response and torque across the rev range. Unlike generic aftermarket solutions, this pipe is **OEM-compatible**, featuring precise fitment to the Ski-Doo s factory exhaust ports, eliminating leaks and ensuring a seamless integration with the stock turbo system. The **smooth, aggressive contouring** of the Y-pipe not only enhances exhaust velocity but also contributes to a more aggressive, sport-tuned sound profile, giving riders a distinct auditory feedback that matches the machine s high-performance capabilities. Whether carving through deep powder, launching off jumps, or pushing the limits in aggressive freeride maneuvers, this exhaust system is engineered to complement the E-TEC 850 s turbocharged power, delivering a noticeable boost in both performance and driving dynamics. Built for riders who refuse to compromise on power or precision, the Straightline Performance Y-Pipe is the ideal upgrade for those seeking to extract every ounce of potential from their Ski-Doo Freeride while maintaining reliability and durability in the harshest conditions.

### **Pros and Cons of buying a Straightline Performance 8704-S471249-64 Y-Pipe for a 2021-2022 Ski-Doo Freeride E-TEC 850 Turbo 165**

1. **Improved Exhaust Flow and Horsepower** The Straightline Y-pipe is designed to optimize exhaust scavenging, which can enhance throttle response and power delivery, especially in high-RPM scenarios. This is particularly beneficial for the E-TEC 850 Turbo, which already has a turbocharged setup.

2. **Better Turbocharger Efficiency** A well-designed Y-pipe helps reduce backpressure, allowing the turbo to spool faster and maintain higher boost levels, which can improve acceleration and overall performance in aggressive riding conditions.

3. **Durability and Build Quality** Straightline is known for manufacturing high-quality aftermarket exhaust components, often using materials like stainless steel or titanium to withstand the demands of off-road and high-performance use.

4. **Compatibility with Stock Components** The part number (8704-S471249-64) suggests it is designed specifically for the 2021-2022 Ski-Doo Freeride E-TEC 850 Turbo 165, reducing the risk of fitment issues compared to generic aftermarket parts.

5. **Aesthetic Appeal** The Y-pipe adds a sportier look to the exhaust system, which may be appealing if you prioritize visual customization alongside performance gains.

6. **Potential for Future Upgrades** A high-quality Y-pipe can serve as a foundation for further exhaust modifications, such as adding a downpipe or larger mufflers, if you decide to pursue additional performance tuning later.

7. **Reduced Exhaust Restriction** The stock exhaust on the E-TEC 850 Turbo 165 may restrict airflow, leading to a slight loss of power. Replacing it with a Straightline Y-pipe can mitigate this issue, particularly in high-load situations.

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1. **Cost** Aftermarket exhaust components, especially from reputable brands like Straightline, are more expensive than OEM parts. The price may be a significant investment if you're on a tight budget.

2. **Potential Warranty Voiding** Ski-Doo may void the factory warranty if you modify the exhaust system, particularly if the modification affects emissions or performance guarantees. Check your warranty terms before proceeding.

3. **Installation Complexity** While the Y-pipe itself is relatively straightforward to install, it may require removing the stock exhaust system, which can be labor-intensive. If you're not mechanically inclined, you may need to pay for professional installation, adding to the cost.

4. **Noise Levels** Aftermarket exhausts often produce louder exhaust notes, which may not be ideal if you ride in areas with noise restrictions or prefer a quieter ride.

5. **Mixed Performance Gains** While the Y-pipe can improve power delivery, the actual gains may vary depending on other factors such as the condition of your turbo, air filter, and fuel system. If these components are worn or clogged, the benefits of the Y-pipe may be limited.

6. **Potential for Emissions Issues** Turbocharged Ski-Doos are often equipped with emissions control systems. Modifying the exhaust could potentially trigger a check engine light or fail emissions tests if not properly tuned. This is less of an issue for off-road use but could be a concern for street-legal applications.

7. **Weight Considerations** Some aftermarket exhausts are heavier than stock components, which could slightly affect handling, though this is usually negligible on an ATV.

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The Straightline Performance Y-pipe for the 2021-2022 Ski-Doo Freeride E-TEC 850 Turbo 165 is a worthwhile upgrade for riders looking to enhance exhaust flow, turbo efficiency, and overall power delivery. The performance gains, especially in acceleration and high-RPM scenarios, make it a strong choice for those who prioritize speed and responsiveness. Additionally, the durability and compatibility of the part further add to its appeal.

However, the cost, potential warranty implications, and the need for careful installation should be considered before purchasing. If you're already planning other performance upgrades (such as a new turbo or fuel system tune), the Y-pipe can serve as a logical next step. For riders who are primarily concerned with reliability and stock performance, the stock exhaust may suffice, and the benefits of the Y-pipe may not justify the expense.

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If you are an aggressive rider who frequently pushes the limits of your Ski-Doo, particularly in off-road or high-performance scenarios, the Straightline Y-pipe is a **strong recommendation**. It offers measurable improvements in exhaust flow and turbo efficiency, which can translate to better acceleration and throttle response.

However, if you are on a tight budget or prefer to keep modifications minimal, you may choose to skip this upgrade and focus on other areas first, such as upgrading your air filter, spark plugs, or fuel system. Additionally, if you plan to perform further modifications (e.g., a downpipe or larger mufflers), the Y-pipe can serve as a solid foundation for those upgrades later.

**Final Verdict:** For the right rider, the Straightline Y-pipe is a **highly beneficial upgrade** that enhances performance without requiring drastic changes to the rest of the engine setup. Proceed with the purchase if you value power and efficiency, but be prepared for the associated costs and potential installation challenges.

Details:

This is helpful if you are buying multiple items. Parts without fitment are to be assumed universal and may require vehicle modification. Straightline Y-Pipe for 2021 - 2022 Ski-Doo Freeride E-TEC 850 Turbo 165: Are a direct bolt-on. Increase of 2-10 horsepower depending on Y-pipe application.

Brand: Straightline Performance, model Number: 8704-S471249-64. No jetting modifications needed with just a Y-pipe. I need to exchange an item. 2018 - 2022 Ski-Doo Freeride E-TEC 850 146.

Available in ceramic or black high-temperature paint.

part #: 8704s47124964 price

• $254.65

specifications exhaustsnowmobilee:

• for models: Turbo, 850, Freeride
• for makes: Ski-doo
• for years: 2021-2022
• brand: Straightline Performance
• mpn: 8704-s471249-64
• part type: Pipe

shipping exhaustsnowmobilee:

• type: Fixed
• service: Standard
• transit: 2-6 Days
• class: Standard
• cost: $0.00

offer exhaustsnowmobilee:

• started: April 14, 2026
• options: Ship-to-home
• quantity: 2
• availability: In Stock
• sold: 0

returns exhaustsnowmobilee:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

payments exhaustsnowmobilee:

• other
• credit card: Discover
• wallet: Apple-pay

general exhaustsnowmobilee:

• condition: New
• Parts Accessories > Snowmobile Parts > Exhaust

seller exhaustsnowmobilee:

• rating: 99.9%
• # reviews: 82916
• city: Boise, ID

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