HONDA 18400-405-000 Exhaust Muffler Tail Pipe Silencer Set 77-78

( Manufacturer Part Number: 18400-405-000 ), ( Type: Exhaust Muffler 4t Bike )

Review HONDA Four Exhaust Muffler Tail Pipe Silencer Set 77-78 fits CB750K 750 1978

The **Honda 18400-405-000 1978 CB750K 750cc Exhaust Muffler and Tail Pipe Silencer Set (compatible with models from 1977 1978)** is a meticulously crafted aftermarket replacement designed to restore the iconic, aggressive growl of the legendary Honda CB750K while ensuring optimal performance and durability. This high-quality exhaust system is engineered to seamlessly integrate with the 1977 and 1978 iterations of the CB750K, a model renowned for its timeless design and powerful inline-four engine. Crafted from premium stainless steel, the muffler and tailpipe are built to withstand the rigors of daily riding, resisting corrosion and maintaining structural integrity even under prolonged exposure to harsh weather conditions. The design retains the classic, slightly aggressive contour of the original Honda exhaust, blending seamlessly with the bike s aggressive stance while delivering a deep, resonant tone that enhances the CB750K s already commanding presence. This exhaust set is not merely a functional upgrade but also a nod to the bike s heritage, offering riders the chance to preserve or revive the authentic sound and character of their machine. Whether used for daily commuting, weekend cruising, or track days, this muffler and tailpipe set ensures a balanced exhaust note that complements the CB750K s legendary power delivery without compromising on performance or style. Perfect for enthusiasts seeking to enhance both the aesthetics and acoustics of their classic Honda, this genuine replacement part is a must-have for anyone looking to keep their CB750K running at its peak while paying homage to its storied past.

### **Pros and Cons of buying a Honda 18400-405-000 (1978 CB750K Exhaust Muffler/Tailpipe/Silencer Set for 77-78 Models)**

1. **Authentic Fitment** This is an OEM or high-quality aftermarket part designed specifically for the 1977-1978 CB750K, ensuring proper fit and function without modifications.

2. **Improved Sound** Replacing worn or damaged mufflers can restore a cleaner, more aggressive exhaust note compared to a clogged or rusted original setup.

3. **Reduced Noise Pollution** If the original mufflers are cracked or perforated, this set may help lower excessive noise levels while maintaining a sporty tone.

4. **Prevents Further Damage** Rust, holes, or internal corrosion in mufflers can lead to exhaust leaks, which may damage the catalytic converter (if equipped) or cause engine backpressure issues.

5. **Aesthetic Improvement** A fresh set of mufflers can enhance the bike s appearance, especially if the originals are heavily corroded or dented.

6. **Potential Performance Boost** If the original mufflers were restricting flow due to clogs or damage, replacing them could slightly improve exhaust scavenging, though gains will be modest.

7. **Easier Maintenance** New mufflers mean fewer leaks, less soot buildup, and an easier inspection of the exhaust system.

8. **Compatibility with Mods** If you plan to add a header or other exhaust upgrades later, these mufflers will integrate smoothly with aftermarket components.

1. **Limited Sound Customization** This is a stock-style replacement, meaning it won t provide a deep, aggressive, or modified tone unless paired with a different muffler design (e.g., straight-pipe or high-flow).

2. **Potential Rust Issues** Even new mufflers may rust over time if exposed to moisture, salt, or poor storage conditions. Look for stainless steel or high-quality materials if longevity is a concern.

3. **Installation Difficulty** If you re not experienced with exhaust work, removing old mufflers (especially on a 40 year-old bike) can be tricky due to rusted bolts or seized components. Professional installation may be required.

4. **Cost vs. Value** For a 1978 bike, the price of this part may be high relative to the bike s overall value. If the bike is a project or low-mileage, weigh whether the investment is justified.

5. **Legal Restrictions** In some regions, exhaust modifications (even stock replacements) may require compliance with noise regulations. Check local laws before installing.

6. **Compatibility with Other Mods** If the bike has a non-stock exhaust system (e.g., a different header or midpipe), these mufflers may not fit perfectly without additional work.

7. **Potential for Counterfeit Parts** Buying from untrusted sellers could result in knockoffs that don t fit or perform as expected. Verify the seller s reputation and part authenticity.

8. **Minimal Performance Gain** Unlike high-flow aftermarket mufflers, this is a direct replacement, so expect only minor (if any) performance improvements.

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### **Conclusion**

The **Honda 18400-405-000 exhaust muffler/tailpipe set for the 1977-1978 CB750K** is a solid choice if your primary goals are **restoring functionality, improving sound quality, and preventing exhaust leaks**. It s a straightforward upgrade that avoids the hassle of dealing with a failing original system. However, it s not a performance-enhancing part its benefits are mostly aesthetic and practical rather than mechanical.

If you re looking for **better sound or performance**, you d need to pair this with a different muffler design (e.g., a straight-pipe or high-flow unit). If the bike is a **project or low-value**, the cost may not be worth it unless the exhaust is severely compromised.

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### **Recommendation**

- Your CB750K s original mufflers are **rusted, cracked, or leaking**, and you want a **direct replacement** without major modifications.

- You want to **restore a cleaner, more aggressive exhaust tone** without going for a heavily modified sound.

- You re **not planning further exhaust mods** and want a **reliable, OEM-style solution**.

- You re comfortable with **basic exhaust work** or can afford professional installation.

- You want a **deeper, more aggressive sound** look for aftermarket mufflers (e.g., Akrapovi , Speed Twin, or custom builds).

- The bike is a **low-mileage or project bike** where the cost doesn t justify the upgrade.

- You re unsure about installation rusted bolts on a 40-year-old bike can make removal difficult.

- You plan to **add a header or midpipe later** verify compatibility before purchasing.

**Final Verdict:** This is a **practical and sensible upgrade** for maintaining or improving the CB750K s exhaust system, but it s not a high-performance or extreme-sound solution. If the original mufflers are failing, replacing them is a smart move just manage expectations regarding sound and performance gains.

Details:

part #: 18400405000 prices

• $250.00-$686.00

specifications cyclemufflermo:

• for models: Cb750k, 750
• for makes: Honda
• for years: 1978
• mpn: 18400-405-000
• type: Exhaust Muffler 4t Bike

shipping cyclemufflermo:

• type: Fixed
• carrier: FedEx
• cost: $150.00
• transit: 5-11 Days
• class: Standard
• service: FedEx Ground / FedEx Home Delivery

payments cyclemufflermo:

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

returns cyclemufflermo:

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

seller cyclemufflermo:

• # reviews: 35617
• city: Lake Havasu City, Arizona
• rating: 99.7%

offer cyclemufflermo:

• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: February 13, 2026
• quantity: 1

general cyclemufflermo:

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

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