1. Exhaust Snowmobile Parts For Sale
  2. sku: 9915216165692722
  3. SPORTS INC 3899-S659639-29

SPORTS PARTS INC 3899-S659639-29 Spi Pipe Exhaust Seal

fits year: 2004–2006.

3899-s659639-29 Sports Parts Inc Spi Y-pipe To Pipe Exhaust Seal-i.d.-67.3mm-o.d.-85mm-height-17mm For 2004-2006

( Brand: Sports Parts Inc ), ( Manufacturer Part Number: 3899-S659639-29 ), ( Part Type: Pipe Seal Exhaust )

Review SPORTS PARTS INC Spi Y pipe To Exhaust Seal-i.d.-67.3mm-o.d.-85mm- Height 17mm fits 2004–2006

The **SPI Y-Pipe Exhaust Seal (Part Number: 3899-S659639-29)** is a precision-engineered aftermarket component designed to ensure a secure, leak-free connection between the catalytic converter and the downstream exhaust system on select **2004 2006 model vehicles**, particularly those equipped with the **3.8L SPI (Suspension Positioning Ignition) engine**. Crafted from high-quality, heat-resistant materials, this **Y-pipe exhaust seal** features a **67.3mm inner diameter (I.D.)** and an **85mm outer diameter (O.D.)**, allowing for a snug, interference-fit installation that minimizes vibration and prevents exhaust gas from escaping into the engine bay. With a **17mm height**, the seal is engineered to maintain optimal spacing between the catalytic converter and the exhaust manifold, reducing the risk of misalignment or premature wear. This seal is a direct replacement for the factory part, ensuring compatibility with stock and upgraded exhaust systems while maintaining performance and durability. Ideal for both stock and modified applications, the **SPI Y-Pipe Exhaust Seal** is a critical component for maintaining exhaust flow efficiency, reducing backpressure, and extending the lifespan of the catalytic converter and surrounding exhaust components. Built to withstand the extreme temperatures and pressures of high-performance driving, this seal is a must-have for enthusiasts looking to upgrade or restore their vehicle s exhaust system with confidence.

### **Pros and Cons of buying a SPI Y-Pipe Exhaust Seal (Part #3899-S659639-29) for a 2004 2006 Vehicle**

#### **Pros:**

1. **Direct Fitment** This part is specifically designed for 2004 2006 model-year vehicles, ensuring compatibility without modification. It matches the OEM dimensions (ID 67.3mm, OD 85mm, height 17mm), reducing the risk of installation issues.

2. **High-Quality Material** SPI (Sports Performance Industries) is a reputable manufacturer known for durable, heat-resistant exhaust components. The seal is likely made from high-temperature-resistant rubber or silicone, which helps prevent leaks and premature failure.

3. **Easy Installation** The part is a straightforward replacement for the stock exhaust seal, requiring minimal tools and time to install. It fits between the Y-pipe and downpipe, making it accessible for DIYers.

4. **Cost-Effective** Compared to full exhaust system replacements, this seal is a low-cost fix for common exhaust leaks, especially if the rest of the exhaust system is intact. Prices are typically reasonable for a direct-fit part.

5. **Prevents Rust and Leaks** A failing exhaust seal can cause rust buildup, exhaust gas leaks, and a loss of performance. Replacing it proactively can extend the life of the exhaust system and maintain engine efficiency.

6. **Noise Reduction** A properly sealed exhaust system reduces backpressure and exhaust noise, improving overall drivability.

---

#### **Cons:**

1. **Potential for Counterfeit Parts** Some aftermarket parts, including SPI products, may be counterfeit or low-quality knockoffs. Buying from an untrusted seller could result in a poorly made seal that fails quickly.

2. **Wear Over Time** Even high-quality seals degrade due to heat, road debris, and vibration. Depending on driving conditions, it may need replacement every 50,000 100,000 miles, though this varies by vehicle use.

3. **Installation Challenges** If the vehicle has been driven hard or has rusted flanges, removing the old seal (or the surrounding components) can be difficult. A rusted Y-pipe or downpipe may require additional cleaning or replacement.

4. **Limited Longevity in Harsh Conditions** Extreme temperatures, off-roading, or frequent towing can accelerate seal wear. In such cases, a more robust solution (e.g., stainless steel clamps or a full exhaust upgrade) may be needed.

5. **Compatibility Risks** While the part is listed for 2004 2006 models, slight variations in exhaust configurations (e.g., turbocharged vs. naturally aspirated) could cause fitment issues. Always verify the exact application before purchasing.

6. **No Warranty on Some Retailers** Some online marketplaces or discount sellers may not offer warranties or returns, leaving you without recourse if the part fails prematurely.

---

### **Conclusion:**

The **SPI Y-Pipe Exhaust Seal (3899-S659639-29)** is a **practical and cost-effective solution** for fixing leaks in the exhaust system of a 2004 2006 vehicle. Its direct fitment, durability, and ease of installation make it a strong choice for DIYers or those looking to avoid a full exhaust replacement. However, **quality control is critical** purchasing from an authorized dealer or a reputable seller (e.g., RockAuto, Summit Racing, or local auto parts stores) minimizes the risk of counterfeit parts.

If the vehicle has **signs of rust, excessive wear, or a history of exhaust issues**, consider inspecting the surrounding components (Y-pipe, downpipe, clamps) for additional damage that may require attention. For high-mileage or performance-oriented vehicles, pairing this seal with **stainless steel clamps and a high-temperature gasket** could further improve longevity.

### **Recommendation:**

- **Buy from a trusted source** (e.g., RockAuto, Summit Racing, or a local auto parts store with a return policy).

- **Inspect the old seal and surrounding flanges** for rust or damage before installation.

- **Use high-temperature grease** on the seal to ensure a proper fit and prevent leaks.

- **Monitor for leaks** after installation if the seal fails quickly, reassess the installation or consider upgrading to a more durable solution.

**Final Verdict:** This is a **solid, budget-friendly fix** for most 2004 2006 vehicles with exhaust leaks, provided you source it correctly and address any underlying issues. For long-term reliability, pair it with proper maintenance and consider upgrading components if the rest of the exhaust system is worn.

Details:

2006 - Arctic Cat Crossfire 700 EFI Son Pro.: Brand: Sports Parts Inc, model Number: 3899-S659639-29. This is helpful if you are buying multiple items. Parts without fitment are to be assumed universal and may require vehicle modification.

2004 - Arctic Cat Mountain 800 EFI 159. I need to exchange an item. SPI Y-Pipe to Pipe Exhaust Seal-I.D.-67.3mm-O.D.-85mm- height 17mm for 2004 2006 Arctic Cat Saber cat 700 EFI EXT Snowmobile: Y-pipe exhaust seal.

part #: 3899s65963929 price

  • $20.58

specifications exhaustsnowmobilee:

  • for years: 2004-2006
  • brand: Sports Parts Inc
  • mpn: 3899-s659639-29
  • part type: Pipe Seal Exhaust

offer exhaustsnowmobilee:

  • started: April 13, 2026
  • options: Ship-to-home
  • sold: 0
  • quantity: 9
  • availability: In Stock

general exhaustsnowmobilee:

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

returns exhaustsnowmobilee:

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

seller exhaustsnowmobilee:

  • city: San Marcos, CA
  • rating: 99.9%
  • # reviews: 82772

shipping exhaustsnowmobilee:

  • transit: 3-7 Days
  • service: Standard
  • cost: $0.00
  • type: Fixed
  • class: Standard

payments exhaustsnowmobilee:

  • credit card: Diners-club
  • wallet: Apple-pay
  • other
for years: 2004-2006, part type: pipe seal exhaust,
category: snowmobile parts > exhaust, sku: 9915216165692722,
Sports Parts Inc 3899-S659639-29 Is Similar To:
exhaustsnowmobilee logo
1 offer $20.58 USD
  • New. Offer #1 priced at $20.58 + $0.00 shipping estimate = $20.58* total. 2004 - 2006 Arctic Cat F7 Firecat. Y-pipe to pipe exhaust seal.FREE SHIPPING

Copyright © exhaustsnowmobilee.com