HARLEY P38-P32 Big Cylinder Heads 16720-84B 16721-84C

( Manufacturer Part Number: P38-P32 ), ( Type: Cylinder Head ), ( Oe/oem Part Number: 16721-84c 16720-84b ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review HARLEY Oem Inch Big Cylinder Heads fits TWIN EVO FXR 1980–1991

Introducing the P38-P32 Harley-Davidson 1984-1991 80 Big Twin EVO Cylinder Heads (Part Numbers: 16720-84B and 16721-84C), designed specifically for Harley-Davidson FXR models. These high-performance cylinder heads provide an excellent upgrade for your motorcycle's engine, enhancing power, torque, and overall engine efficiency.

The P38-P32 cylinder heads are engineered with a large combustion chamber volume, enlarged intake and exhaust ports, and optimized valve angles. These features allow for improved air and fuel flow, resulting in increased horsepower and torque. The enlarged ports also facilitate better cooling, reducing the risk of engine overheating, and ensuring consistent performance.

The intake and exhaust valves are designed with a larger diameter and a more aggressive valve angle. These modifications provide better exhaust gas scavenging, improving the combustion process and resulting in more power and better engine response. The valves are made from high-quality materials, ensuring durability and long-lasting performance.

The P38-P32 cylinder heads are CNC-machined to ensure precision and accuracy. The machining process allows for a perfect fit and excellent finish, ensuring a seamless installation process. The heads are also port-matched to ensure optimal flow between the intake and exhaust ports, further enhancing engine performance.

These cylinder heads are suitable for both street and racing applications. They offer impressive gains in horsepower and torque, making them an excellent choice for riders seeking to enhance the performance of their Harley-Davidson FXR. The upgrade is straightforward, and the kit includes all necessary hardware, making the installation process hassle-free for even the most novice of mechanics.

In conclusion, the P38-P32 Harley-Davidson 1984-1991 80 Big Twin EVO Cylinder Heads are a high-performance upgrade for your motorcycle's engine. They offer significant gains in power, torque, and overall engine efficiency, making them an excellent investment for any Harley-Davidson FXR owner. With their precise machining, high-quality materials, and optimized design, these heads are sure to provide long-lasting performance and enhance the riding experience.

Buying Harley-Davidson 1984-1991 80 Big Twin Evo cylinder heads (P38-P32, 16720-84b, and 16721-84c for FXR models) can be a significant investment for Harley-Davidson enthusiasts looking to upgrade their engines or restore their motorcycles. Here are some potential pros and cons to consider before making a purchase.

1. Improved Performance: Upgrading to newer cylinder heads can lead to increased horsepower and torque, resulting in improved engine performance.

2. Enhanced Durability: The later model cylinder heads may offer improved durability compared to the original heads, reducing the likelihood of engine failures or rebuilds.

3. Cosmetic Appeal: Some riders may prefer the newer, more modern-looking cylinder heads for their motorcycle restoration projects or personal preferences.

4. Availability: These cylinder heads are readily available on the aftermarket, making them a relatively easy upgrade for Harley-Davidson owners.

1. Cost: The price of new or even used cylinder heads can be quite high, making them a significant investment for many riders.

2. Installation Complexity: Installing new cylinder heads can be a challenging and time-consuming process, especially for those without mechanical experience or the proper tools.

3. Compatibility: Ensure the cylinder heads are compatible with your specific Harley-Davidson model and year before purchasing to avoid any potential compatibility issues.

4. Potential Engine Modifications: Installing new cylinder heads may require additional engine modifications to ensure proper functioning and performance.

In conclusion, buying Harley-Davidson 1984-1991 80 Big Twin Evo cylinder heads (P38-P32, 16720-84b, and 16721-84c for FXR models) can offer numerous benefits, including improved performance, enhanced durability, and cosmetic appeal. However, the investment can be significant, and the installation process may be complex. Consider your personal goals, budget, and mechanical expertise before making a decision.

If you are considering buying these cylinder heads, make sure to do thorough research and seek advice from experienced Harley-Davidson mechanics or enthusiasts. Ensure you have the necessary resources for the installation process and budget for any additional engine modifications that may be required. Ultimately, the decision to purchase these cylinder heads should be based on your personal goals, budget, and mechanical expertise.

Details:

Please look carefully and use the zoom feature on all of photos as they are most. Engine was still running when torn down with a bolt stuck into each piston. Hawkins Corvette Sales, Pauli IN 47454, Since 1976 84-91 Oem front and rear Evo 80ci top breather cylinder heads. Spark plug threads are good.

Both have some damage to edge of combustion chamber where a bolt was dropped down each spark plug hole by jealous girlfriend. The combustion chambers held liquid for over an hour without leaking past valves.

part #: p38p32 prices

• $235.00-$370.00

specifications cylindermotorcycleiz:

• for models: Fxr, Twin, Evo
• for makes: Harley
• for years: 1980-1991
• mpn: P38-p32
• type: Cylinder Head
• oe/oem part number: 16721-84c 16720-84b
• vintage part: Yes
• country of origin: United States

seller cylindermotorcycleiz:

• rating: 100.0%
• city: Paoli, Indiana
• # reviews: 1017

returns cylindermotorcycleiz:

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

shipping cylindermotorcycleiz:

• transit: 5-11 Days
• carrier: USPS
• class: Standard
• cost: $43.46
• type: Calculated
• service: USPS Ground Advantage

offer cylindermotorcycleiz:

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

payments cylindermotorcycleiz:

• wallet: Apple-pay
• other
• credit card: Visa
• money order

general cylindermotorcycleiz:

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

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