CHAMPION CCH-404 Copper Spark Plug

( Brand: Champion ), ( Manufacturer Part Number: CCH-404 ), ( Country Of Origin: United States ), ( Type: Replacement )

Review CHAMPION Copper Plus Spark Plug Each #cch-404 Harley Davidson

The **Champion CCH-404 Copper Spark Plug** is a high-performance, precision-engineered component designed specifically for Harley-Davidson engines, delivering reliable ignition and optimal combustion efficiency for both classic and modern Big Twin applications. Engineered with a **copper core electrode**, this spark plug offers superior heat dissipation and conductivity compared to traditional nickel-based designs, ensuring consistent firing even under demanding conditions. The **404 heat range** strikes an ideal balance between performance and durability, making it well-suited for Harley-Davidson engines that operate in moderate to high-temperature environments, such as cruisers, touring bikes, and sport-touring models. The **resistor-type construction** minimizes radio interference, reducing electrical noise that could disrupt communication systems or audio equipment, a critical consideration for riders who prioritize both performance and connectivity.

The **iridium-tipped ground electrode** enhances wear resistance, extending the plug s lifespan and maintaining a stable spark gap over thousands of miles. This design minimizes fouling and pre-ignition risks, ensuring consistent power delivery and smoother throttle response essential for Harley-Davidson s signature deep, growling torque. The **copper core** also aids in faster warm-up times, reducing cold-start issues and improving fuel efficiency during the initial engine break-in period. Built to meet or exceed OEM specifications, the CCH-404 features a **standard 14mm thread size** and a **19mm shell diameter**, ensuring a secure, leak-proof fit in Harley-Davidson s cylinder heads, whether in stock configurations or aftermarket builds.

For riders who demand both heritage reliability and modern performance, the Champion CCH-404 is an excellent choice, offering a blend of durability, efficiency, and compatibility with Harley-Davidson s legendary engine architecture. Whether maintaining a classic Ironhead or upgrading a modern Evolution or Twin Cam, this spark plug delivers the precision ignition needed to keep the Big Twin roaring with authority, mile after mile.

### **Pros and Cons of Buying Champion CCH-404 Copper Spark Plugs for Harley-Davidson Engines**

1. **Traditional Performance** Copper spark plugs are known for their ability to deliver a strong, consistent spark, which can enhance throttle response and overall engine performance, especially in classic Harley-Davidson engines designed for copper plugs.

2. **Compatibility with Older Harley Engines** Many Harley-Davidson models, particularly those from the 1970s to early 2000s, were originally equipped with copper plugs. Using the correct OEM-style plug ensures proper fitment and avoids potential issues with modern iridium or platinum plugs.

3. **Durability for High-Mileage Engines** Copper plugs are more forgiving in high-mileage engines where carbon buildup or wear may affect performance. They can sometimes tolerate slight fouling better than fine-gap iridium plugs.

4. **Easier to Replace and Maintain** Copper plugs have a larger electrode, making them easier to handle and replace compared to delicate iridium or platinum plugs. This can be beneficial for DIY mechanics or those who prefer a more traditional approach.

5. **Cost-Effective for Basic Use** While not the cheapest option, copper plugs are generally more affordable than premium iridium or platinum plugs, making them a practical choice for riders who prioritize performance over longevity.

6. **Better Heat Dissipation** Copper has excellent thermal conductivity, which can help prevent overheating in certain engine conditions, particularly in older Harley engines with less efficient cooling systems.

7. **Compatibility with Carbureted Engines** If your Harley still runs on carburetors (rather than fuel injection), copper plugs can help maintain proper ignition timing and fuel-air mixture balance.

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1. **Shorter Lifespan Compared to Modern Plugs** Copper plugs typically need replacement every **10,000 15,000 miles**, whereas iridium or platinum plugs can last **50,000 100,000 miles**. This means more frequent maintenance and higher long-term costs.

2. **Higher Heat Range Requirements** Copper plugs require a **hotter heat range** (e.g., 6 8) to prevent fouling, which may not be ideal for all Harley engines, especially modern ones with improved combustion efficiency. Using the wrong heat range can lead to pre-ignition or detonation.

3. **Less Fuel Efficiency** The larger electrode gap in copper plugs can result in slightly less efficient combustion compared to fine-gap iridium plugs, which may reduce fuel economy in modern engines.

4. **Potential for Carbon Fouling** Copper plugs are more prone to carbon buildup, especially in engines with rich fuel mixtures or poor air filtration. This can require more frequent cleaning or replacement.

5. **Not Ideal for High-Performance or Modern Tuning** If you modify your Harley with aftermarket exhaust, fuel systems, or high-performance components, copper plugs may not perform as well as iridium or platinum plugs, which are optimized for precise ignition timing.

6. **Limited Availability of OEM-Style Copper Plugs** While Champion still produces copper plugs, they may not be as widely stocked as universal or aftermarket options, making them harder to find in some regions.

7. **Potential for Overheating in High-Compression Engines** Some modern Harley engines (especially those with higher compression ratios) may run too hot with copper plugs, leading to premature wear or failure.

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Champion CCH-404 copper spark plugs are an excellent choice for **classic Harley-Davidson engines** that were originally designed with copper plugs, particularly in carbureted models or those with high mileage. They offer **strong ignition performance, ease of replacement, and compatibility with older systems**, making them a reliable option for riders who prioritize traditional operation and don t mind more frequent replacements.

However, for **modern Harley-Davidson engines (especially fuel-injected models with high-performance modifications)**, iridium or platinum plugs are generally a better long-term investment due to their **longevity, fuel efficiency, and reduced maintenance needs**. If you re running a **stock or lightly modified classic Harley**, copper plugs remain a solid, proven choice. For everything else, modern plugs may be more practical.

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- You own a **pre-2000s Harley-Davidson** (especially carbureted models like the **Electra Glide, Sportster, or Dyna**).

- You prefer **traditional performance** and don t mind replacing them every **10,000 15,000 miles**.

- Your engine has **high mileage or signs of carbon buildup**, and you want a plug that can handle it better than fine-gap iridium.

- You enjoy **DIY maintenance** and find copper plugs easier to work with.

- You have a **modern Harley-Davidson (2000s present) with fuel injection**.

- You want **longer plug life (50,000 miles) and better fuel efficiency**.

- Your bike is **highly modified** with performance parts that benefit from precise ignition timing.

- You prefer **lower maintenance** and don t want to replace plugs as often.

For **stock or lightly modified classic Harleys**, the Champion CCH-404 is a **great, budget-friendly option** that keeps things simple and effective. For **modern or performance-oriented bikes**, upgrading to iridium plugs is the smarter long-term choice.

Details:

Davidson FLSTS Heritage Springier Softail. Spark plug Patented SAC-9 semi-conductor resistor. Fit Guide model Copper Plus Spark Plug. Beginning with R are resistor.

Control of heat range, optimizing. For maximum EMI and RFI. FXS Super Glide Low Rider. Rust prevention Sold each NOTE: Part numbers.

Order by Champion numbers. FLHR Electra Glide Road King. The following applications:Harley Davidson FL. Davidson FXS Super Glide Low.

Davidson FLHTCUI Ultra Classic Electra. Product Fitment This item fits. Details Copper Plus spark plugs. Each #CCH-404 Harley Davidson Product.

80 Electra Glide 1980 Harley Davidson. Electrode that allows for accurate. FXEF Super Glide Fat Bob. Performance and longevity of.

Suppression Patented Ultra seal coated shell for. Have a copper core center. Champion Copper Plus Spark Plug. Davidson FXDWG DNA Wide Glide.

part #: cch404 prices

• $9.76-$85.88

specifications cyclesparkplugs:

• for makes: Harley, Davidson
• brand: Champion
• mpn: Cch-404
• country of origin: United States
• type: Replacement

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• credit card: Discover
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seller cyclesparkplugs:

• city: Los Angeles, California
• rating: 98.4%
• # reviews: 1081

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• service: USPS Priority Mail
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general cyclesparkplugs:

• condition: New
• Motorcycle Scooter Parts Accessories > Electrical Ignition Components > Spark Plugs

offer cyclesparkplugs:

• started: April 14, 2026
• availability: In Stock
• sold: 0
• options: Ship-to-home
• quantity: 1

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