HARLAND SHARP 4006S-1 Rocker Shaft

( Brand: Harland Sharp ), ( Manufacturer Part Number: 4006S-1 ), ( Part Type: Shaft )

Review HARLAND SHARP Rocker Shaft Ford Fe fits 390 427 428

The Harland Sharp 4006S-1 rocker arm shaft is a high-performance component designed specifically for Ford FE engines with displacements of 390, 427, and 428 cubic inches. This part is a critical upgrade for any enthusiast seeking optimal engine performance and durability.

Manufactured by Harland Sharp, an industry leader known for its expertise in engine components, this rocker arm shaft is meticulously crafted from premium materials. It is made from heat-treated 4340 chromoly steel, ensuring superior strength and rigidity. This material's high tensile strength and toughness make it an ideal choice for the demanding conditions of high-performance applications.

The Harland Sharp 4006S-1 rocker arm shaft features a precision-machined design with a large diameter shaft and robust roller bearings. These bearings are made from top-quality materials, ensuring long-lasting performance and minimal wear. The large diameter shaft allows for increased leverage, leading to better valve control and improved engine response.

One of the most significant benefits of this rocker arm shaft is its adjustability. It includes a set of adjustable cam followers that provide the ability to fine-tune the valve clearance. This feature is crucial for maintaining optimal engine performance and ensuring consistent power delivery throughout the RPM range.

The Harland Sharp 4006S-1 rocker arm shaft also boasts a polished finish, which not only enhances its visual appeal but also offers several advantages. A polished surface reduces friction and wear, ensuring a smoother operation and longer component life. Additionally, it makes the installation process easier, as it allows for better alignment during installation.

In summary, the Harland Sharp 4006S-1 rocker arm shaft is an excellent upgrade for Ford FE engines with displacements of 390, 427, and 428 cubic inches. It offers superior strength, adjustability, and durability, ensuring optimal engine performance and longevity. The precision-machined design, premium materials, and adjustable cam followers make it a must-have for any serious Ford enthusiast seeking peak engine power and reliability.

The Harland Sharp 4006S-1 rocker arm shaft is a popular upgrade for Ford FE 390, 427, and 428 engines. This part is known for its high-performance capabilities and durability. Here are some pros and cons to help you make an informed decision about purchasing this component:

1. Enhanced Performance: Harland Sharp rocker arms are designed to provide better valve control and air/fuel mixture for improved engine performance.

2. Increased Longevity: The 4006S-1 rocker arm shaft is made from high-quality materials, ensuring a longer lifespan compared to stock components.

3. Improved Valve Lash Adjustment: The Harland Sharp rocker arms come with adjustable valve lash adjusters that make setting the valve clearance easier and more accurate.

4. Suitable for High-Performance Applications: This rocker arm shaft is an excellent choice for those seeking to build a high-performance FE engine.

5. Compatibility: The 4006S-1 rocker arm shaft is compatible with most Ford FE engines and is a direct replacement for the stock component.

1. Cost: This aftermarket rocker arm shaft is more expensive than the stock part.

2. Complex Installation: Installing the Harland Sharp rocker arm shaft can be a more complicated process than installing a stock part due to the additional adjusters and different mounting points.

3. Potential Clearance Issues: Depending on the engine configuration, there may be clearance issues with some components, such as the intake manifold or timing cover.

4. Requires Additional Tools: To properly install and adjust the Harland Sharp rocker arm shaft, you may need specialized tools.

In conclusion, the Harland Sharp 4006S-1 rocker arm shaft is an excellent upgrade for those seeking increased performance, durability, and accuracy in their Ford FE engine. However, it comes with a higher cost and a more complex installation process compared to the stock component.

If you are building a high-performance FE engine and are willing to invest in the additional cost and effort, this rocker arm shaft is a solid choice that can provide valuable improvements to your engine. On the other hand, if you are working on a budget build or prefer a simpler installation process, you may want to consider sticking with the stock rocker arm shaft. Ultimately, the decision comes down to your specific needs, goals, and resources.

Details:

The package is dirty and I did open it but decided to go with different rocker arms. Brand new open package Harland Sharp heavy duty rocker shaft for Ford FE big block.

part #: 4006s1 prices

• $331.99-$1539.99

specifications rockeareng:

• for models: 390, 427, 428
• for makes: Ford
• brand: Harland Sharp
• mpn: 4006s-1
• part type: Shaft

general rockeareng:

• condition: New other see details
• Engines Engine Parts > Valvetrain Components > Rocker Arms Parts

payments rockeareng:

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

offer rockeareng:

• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: April 25, 2026

seller rockeareng:

• # reviews: 3810
• rating: 99.2%
• city: Fond du Lac, Wisconsin

shipping rockeareng:

• transit: 4-9 Days
• cost: $0.00
• type: Calculated
• service: USPS Ground Advantage
• class: Standard
• carrier: USPS

returns rockeareng:

• policy: No Returns

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