STRAIGHTLINE PERFORMANCE 9737-S473315-17 Pipe Ski Doo

( Brand: Straightline Performance ), ( Manufacturer Part Number: 9737-S473315-17 ), ( Part Type: Pipe )

Review STRAIGHTLINE PERFORMANCE Y pipe Ski doo E tec fits MX TNT 850 2017–2022

The **Straightline Performance 9737-S473315-17 Y-Pipe** is a meticulously engineered aftermarket exhaust system designed specifically for the **2017 2022 Ski-Doo MX TNT E-TEC 850**, delivering a perfect blend of performance, durability, and precision tuning. Crafted from high-grade **409 stainless steel**, this Y-pipe is built to withstand the rigorous demands of off-road riding while maintaining structural integrity under extreme conditions. The **smooth, polished finish** not only enhances the aesthetic appeal of your Ski-Doo but also ensures optimal airflow, reducing backpressure and maximizing horsepower output. Engineered with a **customized exhaust flow path**, this Y-pipe optimizes the scavenging of exhaust gases, allowing for improved cylinder filling and better combustion efficiency critical factors for unleashing the full potential of the E-TEC 850 s powerful engine. The **precision-machined flanges** guarantee a secure, leak-free connection to the factory exhaust headers and muffler, eliminating any potential for exhaust gas leaks that could compromise performance. Whether you're tackling rugged trails, pushing the limits in competition, or simply seeking a more aggressive sound and enhanced throttle response, this Y-pipe is a game-changer. Built to meet the exact specifications of your Ski-Doo, it seamlessly integrates with the existing exhaust system, ensuring compatibility without the need for modifications. With its **rugged construction and performance-focused design**, the Straightline Performance Y-pipe is an essential upgrade for riders who demand nothing less than peak efficiency and exhilarating power delivery.

The **Straightline Performance 9737-S473315-17 Y-Pipe** is a popular aftermarket exhaust system designed for the **2017-2022 Ski-Doo MX TNT E-TEC 850**, offering both performance and aesthetic upgrades. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Straightline Performance Y-Pipe**

1. **Improved Horsepower and Torque**

The Y-pipe is designed to optimize exhaust flow, reducing backpressure and allowing the engine to breathe more efficiently. This can result in a noticeable increase in horsepower and torque, particularly in the mid-to-high RPM range. Many riders report a more responsive throttle and better acceleration, especially in off-road conditions where power delivery matters.

2. **Enhanced Exhaust Note**

The Y-pipe produces a deeper, more aggressive exhaust tone compared to the stock system. This is appealing to riders who enjoy a louder, sportier sound, though noise levels are still within legal limits for most areas (though check local regulations, as some regions have restrictions on off-road vehicles).

3. **Lightweight Construction**

Straightline exhaust systems are known for using high-quality stainless steel and lightweight materials, which reduces overall weight. This can improve handling and maneuverability, especially on technical terrain where agility is key.

4. **Durability and Quality**

Straightline is a reputable manufacturer with a strong reputation for durability. Their exhaust systems are built to withstand the rigors of off-road use, including impacts, vibrations, and extreme temperatures. The components are often coated with protective finishes to prevent rust and corrosion.

5. **Compatibility and Fitment**

The 9737-S473315-17 model is specifically designed for the **2017-2022 Ski-Doo MX TNT E-TEC 850**, ensuring a precise fit without the need for extensive modifications. This reduces the risk of leaks or improper installation.

6. **Aesthetic Appeal**

The Y-pipe design is sleek and aggressive, giving the bike a more customized and sporty look. Many riders appreciate the visual upgrade, as it sets their vehicle apart from stock models.

7. **Potential for Further Tuning**

The improved exhaust flow can pair well with other performance modifications, such as upgraded air filters, intake systems, or ECU tuning. This makes the Y-pipe a versatile choice for riders looking to build a more powerful setup over time.

8. **Warranty and Support**

Straightline offers warranties on their products, and their customer support is generally reliable. This provides peace of mind in case of manufacturing defects or installation issues.

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### **Cons of the Straightline Performance Y-Pipe**

1. **Cost**

The Y-pipe is an aftermarket part, and while it is not excessively expensive, it is still a significant investment compared to stock components. Prices typically range between **$300 and $500**, depending on the retailer and any additional accessories (e.g., mounting brackets, gaskets). This cost may be a deterrent for riders on a tight budget.

2. **Installation Complexity**

While the fitment is generally straightforward, installing an aftermarket exhaust system requires some mechanical skill. It involves removing the stock exhaust, sealing gaps, and ensuring proper mounting. Riders without experience may need to hire a professional, adding to the overall cost. Improper installation can lead to leaks, rattles, or even damage to the vehicle.

3. **Potential for Increased Heat**

Aftermarket exhaust systems can generate more heat due to improved airflow and reduced insulation. While this is generally not a major issue for the E-TEC 850, it can affect nearby components (e.g., suspension, frame, or other exhaust parts). Proper heat shielding may be necessary to prevent overheating of sensitive areas.

4. **Noise Levels**

Although the exhaust note is often desirable, some riders may find the sound too loud for their preference or for legal compliance in certain areas. While the Y-pipe is not excessively noisy, it does produce a more aggressive tone than stock, which may not suit riders who prefer a quieter ride.

5. **Maintenance Requirements**

Aftermarket exhaust systems may require more frequent inspections to ensure gaskets, clamps, and mounting points remain secure. Vibrations and impacts on the trail can loosen components over time, necessitating periodic checks.

6. **Potential for Power Loss Without Tuning**

While the Y-pipe is designed to improve performance, some riders report that without ECU tuning or other supporting modifications, the gains may be modest. The engine s ECU may not fully optimize fuel delivery for the new exhaust flow, leading to slightly reduced efficiency or power in some cases. Tuning can mitigate this but adds to the cost.

7. **Limited Resale Value**

Custom exhaust systems can reduce the resale value of the vehicle, as many buyers prefer stock or OEM parts. This is a consideration if you plan to sell the bike in the future.

8. **Compatibility with Other Mods**

If you plan to add other performance parts (e.g., a downpipe, cat-back system, or turbocharger), you ll need to ensure compatibility. The Y-pipe is a mid-pipe, so pairing it with a cat-back system would require careful selection to avoid conflicts.

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### **Conclusion**

The **Straightline Performance 9737-S473315-17 Y-Pipe** is a solid choice for riders of the **2017-2022 Ski-Doo MX TNT E-TEC 850** who prioritize performance, exhaust tone, and aesthetics. It delivers measurable power gains, a more engaging ride, and a custom look without requiring drastic modifications. The durability and quality of Straightline exhausts make it a reliable long-term investment for off-road use.

However, the cost, installation requirements, and potential maintenance needs are factors to consider. If you are willing to invest time and money into upgrading your bike and enjoy a more aggressive sound and performance, the Y-pipe is an excellent addition. For riders who prefer minimal modifications or are on a tight budget, the stock exhaust may suffice, though it will lack the performance and aesthetic benefits.

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### **Recommendation**

- You want noticeable power and torque improvements.

- You enjoy a deeper, sportier exhaust note.

- You are comfortable with installation or have access to a mechanic.

- You plan to pair it with other performance mods (e.g., tuning, air intake).

- You value the aesthetic upgrade and are willing to pay for a high-quality aftermarket part.

- You are on a tight budget and prefer to save for other upgrades.

- You dislike loud exhaust tones or are in an area with strict noise regulations.

- You lack mechanical experience and are unwilling to pay for professional installation.

- You prioritize resale value and prefer to keep the bike stock or with minimal modifications.

For the best results, consider pairing the Y-pipe with **ECU tuning** (if available for your model) to fully optimize the power gains. Additionally, ensure you have the necessary tools and a clean workspace for installation to avoid leaks or rattles. Overall, this is a worthwhile upgrade for serious riders looking to enhance their Ski-Doo s performance.

Details:

Straightline Performance Y-Pipe for 2017 2022 Ski-Doo MX Z TNT E-TEC 850: Are a direct bolt-on. Parts without fitment are to be assumed universal and may require vehicle modification. This is helpful if you are buying multiple items. Available in ceramic or black high-temperature paint.

No jetting modifications needed with just a Y-pipe. Increase of 2-10 horsepower depending on Y-pipe application. I need to exchange an item.: Brand: Straightline Performance, model Number: 9737-S473315-17.

part #: 9737s47331517 price

• $254.65

specifications exhaustsnowmobilee:

• for models: Mx, Tnt, 850
• for makes: Ski-doo
• for years: 2017-2022
• brand: Straightline Performance
• mpn: 9737-s473315-17
• part type: Pipe

payments exhaustsnowmobilee:

• other
• credit card: Mastercard
• wallet: Google-pay

general exhaustsnowmobilee:

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

returns exhaustsnowmobilee:

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

offer exhaustsnowmobilee:

• options: Ship-to-home
• availability: In Stock
• quantity: 2
• started: April 15, 2026
• sold: 0

seller exhaustsnowmobilee:

• city: Boise, ID
• rating: 99.9%
• # reviews: 82971

shipping exhaustsnowmobilee:

• service: Standard
• class: Standard
• type: Fixed
• cost: $0.00
• transit: 3-8 Days

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