KAWASAKI 18090-1604 Upper Exhaust Muffler

( Manufacturer Part Number: 18090-1604 ), ( Part Type: Exhaust Muffler )

Review KAWASAKI Upper Exhaust Muffler fits VULCAN CLASSIC 1500 VN 1996–2004

The **Kawasaki 18090-1604 Upper Exhaust Muffler** for the **1996 2004 Kawasaki Vulcan 1500 Classic** is a precision-engineered aftermarket component designed to restore, enhance, or upgrade the stock exhaust system of this iconic cruiser. Crafted from high-quality **409 stainless steel**, this muffler is built to withstand the rigorous demands of daily riding while maintaining a sleek, vintage aesthetic that complements the Vulcan s timeless design. The **1996 2004 model-specific fitment** ensures a seamless integration with the bike s original exhaust architecture, eliminating the need for extensive modifications or compromises in performance. With its **smooth, polished finish** and **reinforced construction**, this muffler not only improves the bike s visual appeal but also contributes to a more refined exhaust note, offering a balanced blend of growl and refinement that enhances the Vulcan s already commanding presence on the road. Whether used as an exact replacement for a worn-out OEM part or as part of a custom exhaust build, this muffler delivers durability, reliability, and a subtle yet noticeable upgrade in both sound and style. Ideal for riders who appreciate the marriage of classic aesthetics and modern engineering, the **18090-1604** is a standout choice for those seeking to preserve or elevate the legacy of their Kawasaki Vulcan 1500.

### **Pros and Cons of buying a Kawasaki 18090-1604 (1996-2004 VN1500 Vulcan Classic) Upper Exhaust Muffler**

1. **Direct Fitment** This muffler is designed specifically for the 1996-2004 Kawasaki VN1500 Vulcan Classic, ensuring compatibility without modifications.

2. **Improved Sound** Replacing the stock muffler can provide a deeper, more aggressive tone while maintaining a balanced exhaust note, depending on the material and design.

3. **Potential Performance Boost** A well-designed aftermarket muffler may reduce backpressure, allowing slightly better exhaust flow, though gains are usually modest on a stock engine.

4. **Aesthetic Appeal** Some aftermarket mufflers feature polished finishes, chrome tips, or unique designs that enhance the bike s appearance.

5. **Easier Maintenance** If the original muffler was damaged or leaking, replacing it with this part can prevent further issues and simplify future servicing.

6. **Cost-Effective Upgrade** Compared to full exhaust systems, this single muffler is relatively affordable, making it a budget-friendly modification.

7. **Compatibility with Other Mods** If you plan to add other exhaust components (e.g., headers, mid-pipe), this muffler can serve as a good starting point.

1. **Sound May Not Be to Everyone s Taste** Some riders prefer the stock exhaust tone, and aftermarket mufflers can produce a louder, more aggressive sound that may not suit quieter riding environments.

2. **Potential for Noise Violations** Depending on local regulations, a louder exhaust may require additional modifications (e.g., a muffler bypass or sound dampening) to comply with noise laws.

3. **Quality Variability** Not all aftermarket mufflers are equal; lower-quality options may rust quickly, leak, or fail prematurely, especially if made from thin or poorly welded materials.

4. **Installation Complexity** While straightforward, removing the stock muffler and installing the new one requires basic mechanical skills, tools, and possibly heat protection (to avoid damaging the catalytic converter).

5. **Limited Performance Gains** Unless paired with other exhaust components (e.g., headers), the power increase from just the muffler will be minimal, often negligible on a stock engine.

6. **Potential for Rust or Corrosion** If the muffler is not made from high-quality stainless steel, it may corrode over time, especially in humid or salty environments.

7. **Resale Impact** Some buyers may prefer stock or original parts, so a modified exhaust could slightly reduce the bike s resale value if not done tastefully.

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### **Conclusion**

The Kawasaki 18090-1604 upper exhaust muffler is a practical and relatively low-risk upgrade for the VN1500 Vulcan Classic. It offers a balance of improved sound, potential minor performance benefits, and aesthetic appeal without requiring extensive modifications. However, the decision depends on your priorities: if you value a deeper exhaust tone and don t mind potential noise concerns, this is a solid choice. If you prefer a quieter ride or plan to keep the bike stock for resale, the upgrade may not be necessary.

For best results, research the muffler s material quality (preferably 409 or 304 stainless steel) and consider pairing it with other compatible exhaust components if you want more significant changes. Always ensure the modification complies with local laws regarding noise and emissions.

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### **Recommendation**

- You want a noticeable but not overly aggressive exhaust tone.

- You re willing to handle a simple installation.

- You prefer a polished or custom look for your bike.

- You re on a budget and want a cost-effective upgrade.

- You dislike louder exhausts or live in a noise-restricted area.

- You prioritize keeping the bike stock for resale.

- You expect significant performance gains (this is not a high-performance part).

- You re unsure about working on exhaust systems or lack basic tools.

**Final Note:** If you re new to exhaust modifications, test the muffler in a controlled environment first to ensure it meets your sound preferences. For long-term durability, invest in a high-quality, rust-resistant model.

Details:

1996 2004 Kawasaki VN 1500 Vulcan Classic. Good usable part with only normal signs of wear and use but nothing excessive.: This is a used part that has been cleaned, tested and inspected to ensure quality. Combined shipping is available for multiple items.

part #: 180901604 prices

• $28.46-$125.00

specifications cyclemufflermo:

• for models: 1500, Vn, Vulcan, Classic
• for makes: Kawasaki
• for years: 1996-2004
• mpn: 18090-1604
• part type: Exhaust Muffler

general cyclemufflermo:

• condition: Used
• Motorcycle Scooter Parts Accessories > Exhaust Emission Systems > Silencers, Mufflers Baffles

seller cyclemufflermo:

• # reviews: 115640
• rating: 99.9%
• city: Chippewa Lake, Ohio

offer cyclemufflermo:

• quantity: 1
• sold: 0
• best offers: True
• options: Ship-to-home
• availability: In Stock
• started: May 1, 2026

shipping cyclemufflermo:

• transit: 4-7 Days
• class: Expedited
• cost: $0.00
• type: Fixed
• service: Expedited

returns cyclemufflermo:

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

payments cyclemufflermo:

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

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