STARTING LINE PRODUCTS 3551-S550943-41 Slp Exhaust Flange Grafoil Seal Cat

( Brand: Starting Line Products ), ( Manufacturer Part Number: 3551-S550943-41 ), ( Part Type: Seal Exhaust Flange )

Review STARTING LINE PRODUCTS Slp Exhaust Flange Grafoil Seal Arctic Cat Le Snowmobile fits ZR EFI XC 600 1998

The **Starting Line 3551-S550943-41 SLP Exhaust Flange Grafoil Seal** is a precision-engineered aftermarket component meticulously designed to ensure a secure, leak-free connection between the exhaust manifold and the catalytic converter on the **1998 Arctic Cat ZR 600 EFI LE-XC** snowmobile. Crafted from high-performance **Grafoil (graphite-based) gasket material**, this seal is engineered to withstand the extreme thermal cycling, vibration, and pressure fluctuations inherent in high-performance snowmobile exhaust systems. Unlike conventional rubber or silicone seals that can degrade prematurely under prolonged heat exposure or mechanical stress, Grafoil exhibits exceptional resistance to oil, fuel, and coolant contamination while maintaining flexibility and resilience across a broad temperature range from the coldest Arctic conditions to the intense heat generated during aggressive throttle applications. The **SLP (Super Low Profile) design** of this flange ensures a minimal intrusion into the exhaust flow path, reducing backpressure and optimizing engine efficiency without compromising structural integrity. This seal is specifically tailored to fit the **ZR 600 EFI LE-XC s** exhaust system, featuring precise cutouts and contours that align flawlessly with the manifold s bolt pattern and the catalytic converter s mounting surface, eliminating the risk of misalignment or improper sealing. Whether you re preparing for a weekend of backcountry touring or a high-speed slalom run, this **Starting Line seal** provides a durable, long-lasting solution that restores factory-level performance while minimizing the risk of exhaust leaks, which can lead to reduced power, increased emissions, or even catastrophic engine damage over time. Built to meet the demands of modern snowmobile engines, it combines the reliability of OEM-grade materials with the precision of aftermarket engineering, making it an indispensable upgrade for enthusiasts seeking both performance and peace of mind.

**Pros and Cons of buying a Starting Line 3551-S550943-41 SLP Exhaust Flange Grafoil Seal for a 1998 Arctic Cat ZR 600 EFI LE XC**

### **Pros**

1. **Compatibility and Fit**: This part is specifically designed for the 1998 Arctic Cat ZR 600 EFI LE XC, ensuring a proper fit without modifications. The SLP (Super Low Profile) flange is optimized for the engine s exhaust system, reducing the risk of leaks or misalignment.

2. **Grafoil Seal Quality**: Grafoil is a high-temperature, flexible sealing material that resists warping, cracking, or hardening over time. It provides a reliable, long-lasting seal that can withstand the thermal and mechanical stresses of the exhaust system, especially in off-road applications where vibrations are common.

3. **Ease of Installation**: The flange is designed to be straightforward to install, requiring only basic tools. The SLP design minimizes the need for adjustments or additional gaskets, saving time during maintenance or upgrades.

4. **Performance Benefits**: A properly sealed exhaust flange reduces exhaust backpressure, which can improve engine efficiency and performance. It also prevents exhaust gases from leaking into the engine bay, maintaining optimal combustion and reducing emissions.

5. **Durability**: The flange is built to endure the rigors of frequent use, especially in snowmobiles where the exhaust system is exposed to cold temperatures, moisture, and vibration. The SLP design is less prone to fatigue compared to thicker or bulkier alternatives.

6. **Support from Starting Line**: Starting Line is a reputable manufacturer known for producing high-quality aftermarket parts for Arctic Cat and other snowmobile brands. Their parts often come with warranties or customer support, which can be reassuring for buyers.

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### **Cons**

1. **Cost**: Compared to generic or OEM replacement parts, this specialized flange may be more expensive. While the price reflects the quality of Grafoil and the SLP design, it could still be a significant investment for budget-conscious buyers.

2. **Limited Availability**: As a specific part for a model-year-specific snowmobile, this flange may not be as widely stocked as more common aftermarket components. Buyers might need to order it online or from specialized dealers, which could involve shipping delays.

3. **Potential Overkill for Minor Repairs**: If the issue with your exhaust system is minor (e.g., a small leak or a loose connection), replacing the entire flange might be more than necessary. In such cases, a simpler seal or gasket could suffice, reducing costs.

4. **Installation Skill Required**: While the flange is designed for ease of installation, improper handling (e.g., overtightening, misalignment, or improper sealing) could lead to leaks or damage. Buyers without mechanical experience might need to consult a professional, adding to the cost.

5. **Compatibility with Modifications**: If your snowmobile has aftermarket exhaust systems, headers, or other modifications, this flange might not fit perfectly without additional adapters or customization. Always verify compatibility with any non-OEM components.

6. **Warranty Limitations**: Depending on the retailer, the warranty on this part may not cover labor or damage caused by improper installation. Buyers should review the warranty terms carefully to understand coverage limits.

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### **Conclusion**

The **Starting Line 3551-S550943-41 SLP Exhaust Flange Grafoil Seal** is a high-quality, model-specific solution for the 1998 Arctic Cat ZR 600 EFI LE XC that offers superior sealing, durability, and performance benefits. Its Grafoil material and SLP design make it ideal for reducing leaks and backpressure, which can enhance engine efficiency and longevity. However, the part s specialized nature comes with higher costs, potential availability issues, and the need for careful installation to avoid complications.

For most owners experiencing exhaust leaks, misalignment, or performance issues related to the flange, this is a **strong recommendation**. It is particularly valuable if you prioritize long-term reliability and are willing to invest in a premium solution. If your issue is minor or budget is a concern, consider whether a simpler seal or gasket would suffice. Always verify compatibility with any aftermarket parts and ensure you have the tools or expertise to install it correctly.

**Final Recommendation**: **Purchase this part if you need a reliable, long-lasting solution for your exhaust flange and are prepared for the associated cost and installation requirements.** For minor leaks or budget constraints, explore alternative options first.

Details:

Parts without fitment are to be assumed universal and may require vehicle modification. I need to exchange an item. SLP Exhaust Flange Grafoil Seal for 1998 Arctic Cat ZR 600 EFI LE XC Snowmobile: For Systems.: Brand: Starting Line Products, model Number: 3551-S550943-41.

1998 - 2002 Arctic Cat ZR 600 Twin Pipe. 1998 - 2001 Arctic Cat ZR 600 EFI LE Twin Pipe. This is helpful if you are buying multiple items.

part #: 3551s55094341 price

• $57.87

specifications exhaustsnowmobilee:

• for models: Zr, Efi, Xc, 600
• for makes: Arctic, Arctic-cat
• for years: 1998
• brand: Starting Line Products
• mpn: 3551-s550943-41
• part type: Seal Exhaust Flange

payments exhaustsnowmobilee:

• other
• wallet: Paypal
• credit card: Visa

returns exhaustsnowmobilee:

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

seller exhaustsnowmobilee:

• rating: 99.9%
• # reviews: 84620
• city: Boise, ID

shipping exhaustsnowmobilee:

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

general exhaustsnowmobilee:

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

offer exhaustsnowmobilee:

• sold: 0
• quantity: 3
• availability: In Stock
• started: May 5, 2026
• options: Ship-to-home

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