STARTING LINE PRODUCTS 1842-S745525-42 Slp Exhaust Flange Seal Grafoil Pipe Pro

( Brand: Starting Line Products ), ( Manufacturer Part Number: 1842-S745525-42 ), ( Part Type: Seal Pipe Exhaust Flange )

Review STARTING LINE PRODUCTS Slp Exhaust Flange Grafoil Seal twin Pipe Polaris Pro Snowmobile fits TWIN 800 2003

The **Starting Line 1842-S745525-42 SLP Exhaust Flange Grafoil Seal for Twin-Pipe 2003 Polaris 800 Pro** is a precision-engineered aftermarket component designed to enhance both performance and longevity of your Polaris 800 Pro s exhaust system. Crafted from high-quality **Grafoil**, a durable and heat-resistant material, this seal ensures a tight, leak-proof fit between the exhaust flange and the twin-pipe assembly, preventing exhaust gases from escaping and maintaining optimal engine efficiency. The seal s unique design accommodates the specific dimensions of the 2003 Polaris 800 Pro s exhaust manifold, providing a perfect interface that minimizes friction while withstanding the extreme temperatures generated during high-performance operation. Whether you re running stock or upgraded exhaust headers, this flange seal helps preserve the integrity of your exhaust system, reducing the risk of premature wear or catastrophic failure. Its robust construction also contributes to a cleaner, quieter exhaust note by sealing gaps that could otherwise allow unburned gases to escape, improving overall engine performance and fuel economy. Ideal for both stock and modified setups, this seal is a straightforward yet critical upgrade for riders seeking reliability, efficiency, and a refined exhaust flow.

The **2003 Polaris 800 Pro** exhaust flange upgrade (part number **1842-S745525-42 SLP Exhaust Flange with Grafoil Seal and Twin Pipe**) is a popular modification aimed at improving exhaust flow, performance, and aesthetics. Below are the key pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Improved Exhaust Flow**

The SLP flange is designed to reduce backpressure compared to the stock exhaust system. This can lead to better throttle response, especially in high-RPM situations, and may enhance engine efficiency by allowing exhaust gases to exit more freely.

2. **Enhanced Performance**

Some riders report noticeable improvements in horsepower and torque, particularly in acceleration and top-end speed. The reduced restriction can help the engine breathe better, though gains may vary depending on the rest of the exhaust setup (e.g., headers, mufflers).

3. **Lightweight Construction**

The SLP flange is made from lightweight materials, which can reduce overall exhaust weight. This may contribute to better handling and agility, though the impact is often marginal compared to other weight-saving modifications.

4. **Compatibility with Aftermarket Exhausts**

The flange is designed to work with aftermarket exhaust systems, including twin-pipe setups. This makes it a versatile choice if you plan to upgrade other components later.

5. **Grafoil Seal for Reliability**

The inclusion of a **Grafoil seal** ensures a secure, leak-free connection between the flange and the exhaust system. Grafoil is durable and resistant to high temperatures, reducing the risk of exhaust leaks over time.

6. **Aesthetic Appeal**

The SLP flange has a sleek, polished look that enhances the visual appeal of the exhaust system. Many riders appreciate the cleaner, more aggressive appearance compared to stock components.

7. **Ease of Installation**

For those with basic mechanical skills, the SLP flange is relatively straightforward to install. It typically requires removing the stock flange, cleaning the mating surfaces, applying thread locker, and securing the new flange with the provided hardware.

8. **Potential for Increased Fuel Efficiency**

While not guaranteed, some riders report slight improvements in fuel economy due to reduced backpressure, though this is often negligible compared to other factors like riding style and maintenance.

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### **Cons**

1. **Limited Performance Gains**

The improvements in power and response are often modest unless paired with other exhaust modifications (e.g., headers, high-flow mufflers). Expect gains of **5 15 horsepower** at best, depending on the rest of the exhaust setup and engine condition.

2. **Cost**

The SLP flange is not cheap, especially when factoring in labor if you re not installing it yourself. Prices typically range from **$150 $250**, and additional costs may arise if you need to replace the stock muffler or headers for optimal results.

3. **Potential for Exhaust Leaks**

While the Grafoil seal is reliable, improper installation (e.g., uneven surfaces, insufficient torque) can lead to leaks. This is more likely if the flange isn t properly aligned or if the seal is damaged during installation.

4. **Voidance of Warranty**

Modifying the exhaust system may void the factory warranty on the engine or emissions components. Polaris may deny coverage for exhaust-related issues if they determine the modification contributed to the problem.

5. **Noise Increase**

A less restrictive exhaust will naturally produce more noise. While some riders enjoy the deeper, louder sound, others may find it too aggressive, especially in residential areas where noise regulations apply.

6. **Emissions Concerns**

The 2003 Polaris 800 Pro was likely equipped with emissions controls (e.g., catalytic converters). Modifying the exhaust could lead to **failed emissions tests** or reduced performance in states with strict regulations. Check local laws before proceeding.

7. **Compatibility Issues**

If the rest of your exhaust system (e.g., mufflers, downpipes) is not optimized for high flow, the SLP flange alone may not deliver significant benefits. It s best paired with a **full aftermarket exhaust** for noticeable results.

8. **Potential for Overheating**

While rare, a poorly designed or installed exhaust system can contribute to exhaust gas recirculation (EGR) issues or overheating in extreme conditions. Ensure the new flange doesn t interfere with cooling airflow.

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### **Conclusion**

The **SLP Exhaust Flange with Grafoil Seal and Twin Pipe** is a worthwhile upgrade for riders looking to **improve exhaust flow, enhance performance slightly, and upgrade the look of their 2003 Polaris 800 Pro**. The benefits are most noticeable when paired with other exhaust modifications, but even alone, it can provide a cleaner, more aggressive sound and better throttle response.

However, the **cost, potential emissions issues, and limited performance gains** (unless paired with a full exhaust system) mean it s not a "must-have" for every rider. If you re already planning a full exhaust upgrade, this flange is a smart choice. If you re only making minor modifications, the gains may not justify the expense.

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### **Recommendation**

- **If you re upgrading the entire exhaust system** (headers, mufflers, downpipes), the SLP flange is a **highly recommended** addition. Pair it with a **high-quality aftermarket exhaust** (e.g., Akrapovic, S&S, or VRS) for the best results.

- **If you re only replacing the flange**, expect **modest improvements** in performance and sound. This may be sufficient if you re satisfied with the stock mufflers and headers.

- **Check local laws** regarding exhaust modifications, especially if you plan to take emissions tests.

- **Install carefully** to avoid leaks, and consider using **high-temperature thread locker** and **exhaust sealant** for added security.

- **Budget for additional costs** if you need to replace other components (e.g., mufflers) to fully realize the benefits.

**Final Verdict:** Worth it for serious riders upgrading their exhaust, but not essential for casual or minimal modifications. Prioritize a **full exhaust system** if you want the most significant performance gains.

Details:

2012 - 2013 Arctic Cat Proclaim M 800 Sno Pro 153.: Brand: Starting Line Products, model Number: 1842-S745525-42. I need to exchange an item. This is helpful if you are buying multiple items.

2010 - 2011 Arctic Cat F6 EFI Sno Pro. SLP Exhaust Flange Grafoil Seal-Twin Pipe for 2003 Polaris 800 PRO X Snowmobile: For Systems. Parts without fitment are to be assumed universal and may require vehicle modification.

part #: 1842s74552542 price

• $57.87

specifications exhaustsnowmobilee:

• for models: 800, Twin
• for makes: Polaris
• for years: 2003
• brand: Starting Line Products
• mpn: 1842-s745525-42
• part type: Seal Pipe Exhaust Flange

seller exhaustsnowmobilee:

• # reviews: 85429
• rating: 99.9%
• city: Boise, ID

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offer exhaustsnowmobilee:

• availability: In Stock
• quantity: 9
• started: May 18, 2026
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• options: Ship-to-home

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• type: Fixed
• cost: $0.00
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• transit: 2-5 Days

general exhaustsnowmobilee:

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

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