1. Motorcycle Silencers, Mufflers & Baffles For Sale
  2. sku: 15905496083826633
  3. HONDA 18310-MA4-670

HONDA 18310-MA4-670 Exhaust Muffler Header Manifold Head 79-82 Pipe

fits model: Cb750k. make: Honda. year: 1981.

18310-ma4-670 Honda 1981 79-82 Cb750k Exhaust Muffler Header Manifold Head Pipe Lot

( Manufacturer Part Number: 18310-MA4-670 ), ( Part Type: Pipe )

Review HONDA 79-82 Exhaust Muffler Header Manifold Head Pipe Lot fits CB750K 1981

The **Honda 18310-MA4-670 1981-1982 CB750K Exhaust Muffler Header Manifold Head Pipe** is a meticulously crafted, high-performance replacement component designed to restore and enhance the iconic roar of your classic Honda CB750K. This exhaust system is a direct-fit solution, meticulously engineered to match the precise dimensions and mounting points of the original equipment, ensuring a seamless integration with your bike s frame and engine. Crafted from high-quality, durable materials, the header manifold and head pipe are built to withstand the rigors of high-performance riding while maintaining structural integrity over time. The muffler, featuring a polished, chrome-finished exterior, not only elevates the aesthetic appeal of your CB750K but also contributes to a more aggressive and commanding exhaust note, characteristic of the legendary "K-box" sound. This exhaust system is ideal for riders seeking to preserve the authenticity of their classic bike while enjoying the benefits of improved exhaust flow and a more dynamic riding experience. Whether you're restoring a show bike or preparing your CB750K for spirited cruising, this exhaust manifold and head pipe combination delivers both performance and timeless style, ensuring your Honda stands out on the road with confidence and character.

### **Pros and Cons of Buying a 1981-1982 Honda CB750K Exhaust Muffler Header Manifold Head Pipe (Part Number: 18310-MA4-670)**

#### **Pros:**

1. **Authentic Fit and Function** This is an original Honda part designed specifically for the CB750K (1979 1982 models), ensuring proper fitment, performance, and compatibility with the engine s exhaust system.

2. **Reliability** Honda parts are known for durability, especially on classic bikes where original components are less prone to premature failure compared to aftermarket alternatives.

3. **Sound and Performance** The stock exhaust system contributes to the CB750K s classic, aggressive growl. Replacing a worn or damaged section with an original part restores the intended sound and minor performance benefits.

4. **Simplified Maintenance** Using an OEM part reduces the risk of compatibility issues with other exhaust components (e.g., mufflers, clamps, or gaskets), making repairs or upgrades easier.

5. **Resale Value** Keeping the bike stock or with original components can preserve its value, especially if you plan to sell it in the future.

6. **Ease of Installation** Since it s a direct replacement, installation is straightforward for someone with basic mechanical skills, requiring only standard tools and possibly a new gasket.

7. **Avoiding Aftermarket Risks** Cheap or poorly made aftermarket parts may not fit correctly, leading to leaks, poor performance, or even damage to the exhaust system over time.

#### **Cons:**

1. **Cost** Original Honda parts can be expensive, especially for older models. Prices may vary depending on availability, condition, and seller (new vs. used).

2. **Limited Availability** Finding a genuine Honda part in stock may require ordering from a specialty dealer, which could involve shipping delays.

3. **Potential for Wear** Even if the part is new, if the rest of the exhaust system (e.g., clamps, muffler mounts, or gaskets) is degraded, the new section may still fail prematurely if not addressed holistically.

4. **No Performance Upgrades** Unlike aftermarket headers or exhausts, this part does not offer any significant power or torque gains it s purely a replacement for a failing component.

5. **Weight** The stock exhaust system is heavier than many aftermarket alternatives, which may slightly affect handling (though the difference is negligible on a bike this size).

6. **Sound Restrictions** Some areas have noise regulations that may not allow the stock exhaust s volume. If you plan to ride in such locations, you may need to pair it with a muffler that meets local laws.

7. **Corrosion Risk** If the part is used, it may have rust or pitting, especially if the bike was stored in wet conditions. A thorough inspection is necessary before purchase.

---

### **Conclusion:**

Buying the **Honda 18310-MA4-670 exhaust header manifold head pipe** for your 1981 1982 CB750K is a **sound choice** if your primary goal is **reliability, authenticity, and restoring the bike s original character**. It avoids the risks of mismatched aftermarket parts and ensures the exhaust system functions as intended. However, if you re looking for **performance upgrades, a louder sound, or weight reduction**, this part alone won t deliver those benefits you d need to pair it with aftermarket components.

The decision ultimately depends on your priorities:

- **Prioritize authenticity and longevity?** Go for the OEM part.

- **Want performance or a custom sound?** Consider an aftermarket header or exhaust system instead.

- **Budget is a concern?** Check for used parts in good condition or explore reputable aftermarket brands that offer similar fitment.

---

### **Recommendation:**

1. **If the part is failing and you want a direct replacement** Purchase the **original Honda part (18310-MA4-670)** from a trusted dealer (e.g., Honda Parts Center, Speedhawk, or a local classic bike shop). Inspect it for rust or damage before installation.

2. **If you re open to upgrades** Research aftermarket headers (e.g., **Akrapovic, Speed Twin, or Yoshimura**) that offer better flow and sound while maintaining compatibility with the CB750K s frame.

3. **If cost is a factor** Look for **used OEM parts** in good condition from classifieds (eBay, Facebook Marketplace) or consider **remanufactured Honda parts** if available.

4. **Always inspect the rest of the exhaust system** Replace any worn clamps, gaskets, or mounts to prevent future leaks or failures.

For a **stock-restored CB750K**, the original part is the best choice. For a **modified or performance-oriented bike**, explore aftermarket options that align with your goals.

Details:

OFFICE USE: LTR-DH 06/26 81HONDACB750K-105505.

part #: 18310ma4670 prices

  • $19.99-$109.99

specifications cyclemufflermo:

  • for models: Cb750k
  • for makes: Honda
  • for years: 1981
  • mpn: 18310-ma4-670
  • part type: Pipe

general cyclemufflermo:

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

seller cyclemufflermo:

  • rating: 100.0%
  • # reviews: 103507
  • city: Anaheim, California

offer cyclemufflermo:

  • started: June 9, 2026
  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • quantity: 1

payments cyclemufflermo:

  • cash
  • other
  • credit card: Mastercard
  • wallet: Apple-pay

returns cyclemufflermo:

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

shipping cyclemufflermo:

  • transit: 3-7 Days
  • cost: $210.42
  • carrier: UPS
  • service: UPS Ground
  • class: Standard
  • type: Calculated
for models: cb750k, for makes: honda, for years: 1981, part type: pipe,
category: motorcycle parts > motorcycle scooter parts accessories > exhaust emission systems > silencers, mufflers baffles, sku: 15905496083826633,
Honda 18310-MA4-670 Is Similar To:
cyclemufflermo logo
2 offers $19.99–$109.99 USD
  • Used. Offer #1 priced at $19.99 + $24.99 shipping estimate = $44.98* total. YOU ARE VIEWING A OEM MUFFLER OFF OF AN 81 HONDA CB750K.+$24.99 shipping
  • Used. Offer #2 priced at $109.99 + $210.42 shipping estimate = $320.41* total. OFFICE USE: LTR-DH 06/26 81HONDACB750K-105505.+$210.42 shipping

Copyright © cyclemufflermo.com