HARLEY-DAVIDSON 16664-66B Cylinder Heads Fx 74CI 1200CC

( Brand: Harley-davidson ), ( Manufacturer Part Number: 16664-66B ), ( Engine Type: 4-stroke ), ( Type: Cylinder Head ), ( Machine Type: Dual Sport Motorcycle, Off-road Motorcycle, Street Motorcycle ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review HARLEY DAVIDSON Oem 74ci Cylinder Heads 1200cc Fx fits SHOVELHEAD FLH FXE FL 1966–1977

Introducing the Harley-Davidson 16664-66B Shovelhead Cylinder Heads, a must-have upgrade for any Harley-Davidson motorcycle enthusiast. These authentic, OEM cylinder heads are designed to fit various Harley-Davidson models from 1966 to 1977. Compatible with the following models: FL, FX, and FXE.

The Shovelhead engine, named for its distinctive shape, is a classic Harley-Davidson powerplant. These cylinder heads are specifically engineered for the 74ci (1200cc) version of this engine. They boast a traditional appearance with their open valve covers, allowing you to showcase the beauty of your engine.

These cylinder heads are crafted with precision and care, ensuring a perfect fit and optimal engine performance. They feature a 66mm bore and a 101.2mm stroke, providing excellent power output and torque. The intake and exhaust ports are designed for efficient gas flow, resulting in a smooth and powerful riding experience.

Each cylinder head comes equipped with hardened valve seats and stainless steel valves. These features ensure superior durability and strength, allowing for extended engine life and reliable performance. Additionally, the cylinder heads include new valve guides and seats, ensuring a proper seal and reducing the risk of leaks.

The Harley-Davidson 16664-66B Shovelhead Cylinder Heads are an excellent investment for any Harley-Davidson enthusiast looking to restore their classic motorcycle to its former glory or enhance its performance. With their authentic design and high-quality construction, these cylinder heads are sure to provide years of enjoyment and satisfaction on the open road.

In summary, the Harley-Davidson 16664-66B Shovelhead Cylinder Heads are a must-have upgrade for any Harley-Davidson motorcycle from 1966 to 1977 with a 1200cc engine. They offer a traditional look, superior durability, and efficient engine performance, making them an essential investment for any Harley-Davidson enthusiast.

Harley-Davidson 16664-66B Shovelhead Cylinder Heads are aftermarket cylinder heads that can be used in various Harley-Davidson models from 1966 to 1977 with engines of 1200cc and 74ci. These heads are suitable for models such as FL, FLH, FX, and FXE. In this discussion, we will explore the pros and cons of buying these cylinder heads to help you make an informed decision.

1. Enhanced performance: These aftermarket cylinder heads offer improved airflow and cooling, leading to better engine performance.

2. Durability: The Shovelhead Cylinder Heads are made from high-quality materials, ensuring they can withstand the rigors of regular use.

3. Compatibility: These heads are designed to fit a wide range of Harley-Davidson models, making them a versatile choice for many riders.

4. Cost-effective: Compared to buying a new Harley-Davidson motorcycle or even a new engine, aftermarket cylinder heads can be a more cost-effective solution for upgrading your bike's performance.

1. Installation complexity: Installing aftermarket cylinder heads can be a complex process and may require professional assistance, adding to the overall cost.

2. Risk of potential issues: Since these are aftermarket parts, there is a risk of encountering compatibility issues or other problems that may require additional repair work.

3. Performance variations: It's important to note that the performance gains from installing these cylinder heads can vary significantly depending on the specific Harley-Davidson model and the condition of the engine before the upgrade.

In conclusion, the Harley-Davidson 16664-66B Shovelhead Cylinder Heads can deliver enhanced performance and improved durability for Harley-Davidson motorcycles from 1966 to 1977 with 1200cc and 74ci engines. However, the installation process can be complex and potentially costly, and there is a risk of encountering compatibility issues or other problems. Ultimately, whether or not these cylinder heads are a good investment for you depends on your specific needs, your budget, and your willingness to take on the potential risks and challenges of the installation process.

If you're considering purchasing these cylinder heads, it's recommended that you do thorough research on the specific model of your Harley-Davidson and the condition of your engine to ensure a successful installation. Additionally, it's a good idea to purchase these heads from a reputable dealer to minimize the risk of encountering compatibility issues or other problems. Lastly, it's essential to consider the potential costs of the installation process and weigh them against the expected performance gains to determine if this upgrade is worth the investment for you.

Details:

Threads overall are decent; however, the front exhaust Flange threads will likely require repair. Please examine photos for condition and quality. Castings remain solid and fully steerable. Whats pictured is whats included.

Condition: OEM used condition. Please see my other listings. FITMENT:Originally produced for 1975 Shovelhead model's but compatible with: 1966 1977 Harley-Davidson 74ci 1200cc engines FL / FLH FX FXE. These are correct mid-1970s 74ci 1200cc heads featuring the external oiling ports and long-reach 3/4 spark plug configuration used during this era.

More coming soon. I ll gladly combine shipping on multiple orders. Features: External oiling ports 3/4 reach spark plugs. Shipping costs are estimates.

The 8-75 casting date makes these period-correct for late 1975 production builds and ideal a date-sensitive restoration. Several cooling fins are broken, typical of Shovelhead castings this era. These are original factory castings not reproduction pieces and retain proper Harley metallurgy chamber geometry. Please view photos and inspect as well.

I do my best to describe everything accurately, but don't know every single detail for year and model. More parts available.

part #: 1666466b prices

• $61.49-$679.99

specifications cylindermotorcycleiz:

• for models: Flh, Fxe, Fl, Shovelhead
• for makes: Harley
• for years: 1966-1977
• brand: Harley-davidson
• mpn: 16664-66b
• engine type: 4-stroke
• type: Cylinder Head
• machine type: Dual Sport Motorcycle, Off-road Motorcycle, Street Motorcycle
• vintage part: Yes
• country of origin: United States

shipping cylindermotorcycleiz:

• type: Fixed
• carrier: USPS
• transit: 4-10 Days
• cost: $0.00
• service: USPS Ground Advantage
• class: Standard

seller cylindermotorcycleiz:

• # reviews: 3966
• city: Powhatan, Virginia
• rating: 99.5%

payments cylindermotorcycleiz:

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

returns cylindermotorcycleiz:

• policy: No Returns

offer cylindermotorcycleiz:

• started: March 3, 2026
• options: Ship-to-home
• best offers: True
• sold: 0
• quantity: 1
• availability: In Stock

general cylindermotorcycleiz:

• condition: Used
• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Cylinder Heads

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